Crocodilians case method: 50 questions

A 3-year-old spectacled caiman (1.2 m) kept at an exhibition facility. For the past six months, to save costs, it has been fed only frozen horse mackerel. This morning it arched its body in the pool and trembled in small jerks; when it tries to climb onto land it staggers and slips back. It floats tilted at the surface, and at moments its snout dips underwater. The keeper has come to work alone today.

Which is the most appropriate first action?

1. Enter the cage alone, pick it up and haul it onto the land area
2. Leave it floating in the water and watch until the seizure stops
3. Call for backup, move it as a team to a shallow land area, keep it warm, and contact a hospital that handles Specified Animals the same day
4. Mix vitamin tablets into its food and watch it until next week

AnswerC. Call for backup, move it as a team to a shallow land area, keep it warm, and contact a hospital that handles Specified Animals the same day

ExplanationLong-term feeding of frozen fish alone causes vitamin B1 deficiency through thiaminase, leading to seizures and unsteadiness. An animal in the water during a seizure will drown, so the first step is to get it out of the water onto a shallow land area and keep it at 28–30°C. However, approaching a Specified Animal alone invites a bite injury, so always call for backup and work as a team. Treatment is vitamin B1, but that requires a vet's judgment; mixing it into food does nothing for an animal that is not eating. Watching it float in the water carries a high risk of drowning, and waiting until next week risks the neurological damage becoming irreversible. Target: see a vet the same day.

IssuesThe unbalanced diet of frozen fish alone continued for six months, and the risk of vitamin B1 deficiency was unknown. The one-person work setup meant the animal could not be approached safely in an emergency. The unsteadiness that precedes neurological signs may also have been missed.

ImprovementCombine frozen fish with whole frozen mice and rats, and record vitamin supplementation in the feeding log. Post emergency backup contacts and a rule that work is done in teams, and secure in advance a hospital that handles Specified Animals, confirming its acceptance conditions.

A January morning in the tank room of a keeping facility. An 8-year-old dwarf caiman lies motionless in a corner of the land area with its mouth half open. Whitish mucus clings around the nostrils, and the throat is moving more than usual. Last night the thermostat on the submersible heater failed and the water temperature dropped to 20°C. Its appetite has been poor for the past few days.

Which is the most appropriate first response in this situation?

1. Raise the water and air temperature to the proper range at once and, because of the mucus, arrange a vet visit the same day
2. Look directly into its mouth and wipe the mucus out with gauze
3. Pour warm water into its mouth to clear the phlegm
4. Winter is a slow season anyway, so leave it and watch until spring

AnswerA. Raise the water and air temperature to the proper range at once and, because of the mucus, arrange a vet visit the same day

ExplanationProlonged cold suppresses a crocodilian's immunity and leads to bacterial respiratory infection. Mucus from the nose and mouth, open-mouth breathing and lying motionless on land are the classic signs. First restore the heater and bring the water back to 26–30°C and the air to 28–32°C; because mucus is present, contact a hospital that handles Specified Animals the same day for antibiotic treatment. Looking directly into the mouth or pouring in water invites bite injuries and aspiration and is forbidden; check from outside the cage. Leaving it until spring as if hibernating lets pneumonia progress to death. Captive crocodilians need no cold period; keeping the water heated in winter is a basic requirement.

IssuesThe thermostat failure went unnoticed overnight, and there was no system to detect a drop in water temperature. The loss of appetite over the past few days was blamed on the season and was not recorded or reported as a warning sign of respiratory infection.

ImprovementInstall an alarmed temperature sensor separate from the thermometer, and log water and air temperature morning and evening. Keep a spare heater on hand and inspect heaters before winter. Record refusal of food and mucus in the daily log, and set a rule to consult a vet if either lasts two days or more.

A 10-month-old spectacled caiman juvenile is being raised at a permitted facility. Recently its lower jaw seems to flex when it grips food, and its tail curves gently to the left. Its diet is mainly strips of chicken breast, and the UVB light has not been replaced in over a year. When it walks, its limbs lack strength and it drags its belly. The keeper tried to fix this by sprinkling on plenty of calcium powder.

Which is the most appropriate response?

1. Sprinkle a large amount of calcium powder at every feeding, and see a vet if there is no improvement after a month
2. Stop hard food so the jaw does not break, give only soft food, and watch
3. Consult a vet the same day, switch to whole prey and replace the UVB light, and have the bones evaluated
4. Sunlight will cure it, so take it out of the cage into the garden to bask during the day

AnswerC. Consult a vet the same day, switch to whole prey and replace the UVB light, and have the bones evaluated

ExplanationA soft jaw, curved tail or spine, and difficulty walking are classic signs of metabolic bone disease, which progresses rapidly in growing juveniles. The cause here is calcium deficiency from a diet of boneless meat alone combined with lack of UVB. Consult a vet the same day, have the bone condition evaluated with blood tests and X-rays, and receive injectable correction if needed. At the same time, switch to whole fish and mice with added calcium and replace the UVB light. Simply piling on powder does not correct the phosphorus ratio or vitamin D3, and the deformity sets in during a month of waiting. Soft food alone leaves the underlying nutritional deficit in place. Taking a Specified Animal out of the cage to bask is prohibited both legally and for safety.

IssuesAn unbalanced diet of boneless meat strips coincided with no management of the UVB light's lifespan. The keeper did not understand that bone disease readily occurs during a juvenile's growth period and did not consult a vet early about the jaw abnormality.

ImprovementBase the diet on whole prey with bones and record calcium and vitamin D3 supplementation. Post the UVB replacement date on the cage and always replace it every 6–12 months. Weigh and measure juveniles monthly, photograph growth stalls and changes in jaw shape, and share them with the vet.

July. A 15-year-old spectacled caiman (1.8 m) is kept at a permitted private facility. Observing from outside the cage at feeding time, the keeper sees redness between the belly scales, with some areas raw and scales starting to peel off. Water changes were skipped for the past two weeks due to a busy schedule, and the water is cloudy and smelly. The land area is constantly wet from splashing and has no dry spot.

Which is the most appropriate first action?

1. Change all the water, set up an environment where the land area can dry, and see a vet if it spreads
2. Enter the cage and apply over-the-counter antiseptic directly to the lesions
3. Add a large amount of table salt to the water to sterilize it and watch for a few days
4. The skin gets worse when it dries, so flood the land area too and keep it constantly wet

AnswerA. Change all the water, set up an environment where the land area can dry, and see a vet if it spreads

ExplanationRedness, ulcers and scale loss on the belly indicate bacterial dermatitis from poor water quality; in summer, warm water lets bacteria multiply quickly. The basics of treatment are to change all the water, restart filtration, and give the animal time to bask on a dry land area. If the ulcers spread or deepen, see a vet for antibiotics. Entering the cage to apply medication carries an extremely high risk of bite injury; if treatment is needed, a vet does it. Adding large amounts of salt can stress the skin and kidneys depending on the species and does nothing for the underlying water quality. Keeping the land area wet robs the skin of drying time and worsens the dermatitis. Target: see a vet within a few days, or the same day if spreading.

IssuesDaily partial water changes were skipped for two weeks, relying on filtration alone. The land area was always wet with no dry resting spot, creating a breeding ground for dermatitis. The setup let the keeper's busy schedule directly affect the animal's hygiene.

ImprovementPut water changes and removal of feces and leftovers on a daily checklist, and increase water changes in summer. Add a slope or step to the land area to avoid splashing and always secure a dry surface. Observe the belly and scales from outside at every feeding, and photograph any redness to track changes.

November. A 5-year-old saltwater crocodile (2.5 m) on loan from a zoo has eaten nothing at all for three weeks. The keeper has not checked the water temperature, and the air temperature depends on room heating, dropping to 22°C at night. The animal mostly sits still in the water, and the base of its tail looks a little thinner. No feces have been seen for two weeks. The keeper had heard that crocodiles are fine without food for months and left it alone.

Which is the most appropriate response?

1. Crocodiles tolerate fasting well, so withhold food and watch until spring
2. Release live fish into the pool to stimulate its appetite and wait until it eats
3. Measure water and air temperature and restore the proper range; since it is losing weight, consult a vet to find the cause
4. Force its mouth open and push food in to force-feed it

AnswerC. Measure water and air temperature and restore the proper range; since it is losing weight, consult a vet to find the cause

ExplanationLow temperature is the most common cause of food refusal in crocodilians, so the first step is to measure and correct the water to 26–30°C and the air to 28–32°C. In this case, however, there is weight loss at the base of the tail and no defecation, so internal illness such as parasites, kidney failure or gout is also possible; consult a vet who handles Specified Animals within a few days and investigate with fecal and blood tests. It is true that a healthy crocodilian tolerates fasting, but a thinning animal is different, and leaving it until spring leads to decline. Live fish cause parasites and vitamin B1 deficiency and do not solve the refusal. Force-feeding carries high risks of bite injury and aspiration; if needed, a vet does it under sedation.

IssuesWater and air temperatures were never measured and were left to room heating, so nighttime cold triggered the food refusal. The idea that crocodiles are fine without food took on a life of its own, and the warning signs of weight loss and no defecation were dismissed.

ImprovementPlace water and air thermometers at several points in the cage and make morning and evening logging mandatory. In winter, keep nighttime temperatures in range with a submersible heater and heat lamp. Log food amounts, leftovers and defecation, and share a facility-wide rule to consult a vet after two weeks or more of refusal or any weight loss.

A spectacled caiman (1.9 m) kept for 12 years. Perhaps because it drinks less in the summer heat, the pool clouds within a few days, yet water changes were only weekly. Its diet is frozen rats only, three times a week, on the heavy side. For the past week the right knee joint has swelled into a round lump, and it drags the leg when climbing onto land. It cannot be touched, but viewed from outside the cage the swelling grows by the day. Its appetite has also dropped.

Which is the most appropriate interpretation and response?

1. It is a bruise, so fill the pool with cold water to cool it and wait for the swelling to go down
2. Gout or kidney failure is suspected. Keep the water clean and see a vet by the same day or next day for blood tests
3. It is thin from too little food, so increase the rats further
4. Human painkillers work for arthritis, so mix them into its food

AnswerB. Gout or kidney failure is suspected. Keep the water clean and see a vet by the same day or next day for blood tests

ExplanationA round joint swelling, dragging limbs and reduced appetite, combined with an unbalanced high-protein overfeeding, a tendency to dehydration and poor water quality, strongly suggest gout, where uric acid accumulates in the joints, or kidney failure. Left alone, kidney damage progresses and uric acid deposits in multiple organs, making recovery difficult; have blood tests at a hospital that handles Specified Animals by the same day or next day and receive fluids and a dietary review. Cooling with cold water only lowers body temperature, reducing metabolism and immunity, and assuming a bruise is dangerous. More food increases uric acid production and worsens it. Many human painkillers cause kidney damage in reptiles and the dose is unknown; never give them.

IssuesExcessive high-protein feeding of rats three times a week continued for an adult, and water quality management was inadequate at once a week while heat reduced drinking. The keeper had created the classic triggers of gout: long-term dehydration and an unbalanced diet.

ImprovementLimit adults to feeding 1–2 times a week and combine fish and mammals to avoid imbalance. Increase water changes in summer and always provide clean drinking water. Have annual checkups with blood tests to know uric acid levels and kidney function. Photograph joint swelling and report changes in size to the vet.

At midnight, checking the facility's security camera, the keeper sees a 10-year-old saltwater crocodile (3 m) lying motionless on the bottom of the deep pool. It normally rests with eyes and nostrils above the surface, but tonight its whole body is submerged and it occasionally thrashes its tail as if struggling. It had been breathing with its mouth open for several days, but the keeper was too busy to deal with it. Water temperature is 24°C. The keeper is on night duty alone.

Which is the most appropriate first action?

1. Get into the pool and lift its head to the surface
2. Watch until morning and discuss with colleagues when they arrive
3. Drain the pool to make it shallow, call for backup, raise the water temperature, and contact an after-hours hospital
4. Slap the surface with a pole to startle it into floating on its own

AnswerC. Drain the pool to make it shallow, call for backup, raise the water temperature, and contact an after-hours hospital

ExplanationA crocodilian that sinks and cannot float has lost buoyancy control because fluid has built up in the lungs from pneumonia or similar, and this meets the criteria for an emergency vet visit. The open-mouth breathing over the previous days was the warning sign. To prevent drowning, first drain the pool to a depth where the snout is above the surface so the head can be kept slightly raised. At the same time, raise the water and air temperature to the proper range, call for backup to work as a team, and contact a hospital that handles Specified Animals even at night. Getting into the pool with a 3 m crocodile could mean a fatal bite. Leaving it until morning makes drowning likely. Slapping with a pole increases oxygen consumption through stress and makes it sink further.

IssuesOpen-mouth breathing, an early sign of respiratory infection, was left for several days, and the lowish water temperature of 24°C was not corrected. With one person on night duty, no system for backup or hospital contact had been set in advance.

ImprovementMake a rule to raise the temperature and consult a vet the same day whenever open-mouth breathing or mucus is seen. Build the pool so the water level can be lowered quickly with a drain valve, and post the operating procedure. Set up a nighttime emergency contact chain and confirm in advance which hospitals accept patients at night.

A spectacled caiman (4 years, 1.3 m) transferred from another facility for exhibition. A month after arrival, it eats but has grown so thin its spine stands out. Its feces are watery, sometimes with mucus. The previous facility reportedly fed it live fish from a pond. No fecal test was done at intake. Other caimans are housed in the same tank room, and cleaning tools are shared.

Which is the most appropriate response?

1. Double the food to fatten it up and wait for the diarrhea to clear on its own
2. Release live fish into the pool so it can eat freely to make up for the weight loss
3. Mix an over-the-counter dog dewormer into its food, dosed by body weight
4. Collect feces for testing by a vet, stop sharing tools with other animals, and treat it as isolated

AnswerD. Collect feces for testing by a vet, stop sharing tools with other animals, and treat it as isolated

ExplanationLosing weight despite eating, watery stool and mucus in the stool are classic signs of parasites, especially suspicious in an animal that is wild-caught or has been fed live fish. First collect fresh feces for a vet to test, and deworm according to the species of parasite found. Parasites spread to other animals in the same room via feces, so stop sharing cleaning tools, treat it as isolated, and enforce hand washing and disinfection. More food only feeds the parasites and does not cure the diarrhea. Live fish bring in new parasites and also cause vitamin B1 deficiency. Dog dewormers have no established safety or dosage for reptiles and risk poisoning. Target: see a vet within a few days.

IssuesNo fecal test or quarantine period at intake; the animal was housed in the same room as others right away. Despite hearing about the previous facility's live-fish diet, the parasite risk was not considered. Shared tools could have spread infection across the whole facility.

ImprovementGive new arrivals a quarantine period of at least 1–3 months with fecal tests on arrival and at the end. Provide dedicated cleaning tools for each animal and work from healthy animals first. Obtain the diet and medical history in writing from the transferring facility and keep it on record.

A dwarf caiman (1.4 m) kept for six years has been swimming tilted to the right since morning and circling in the same direction. When it tries to climb onto land it falls to the right. For several months its diet has been frozen pond smelt only, with no vitamin supplement at feeding. Breathing is normal and there is no mucus in the mouth. The keeper, thinking it is an ear disease, has started looking for over-the-counter ear drops.

Which is the most appropriate interpretation and response?

1. Suspect neurological signs such as vitamin B1 deficiency, move it to a shallow land area so it cannot drown, and see a vet the same day
2. It is an ear infection, so drip dog or cat ear drops onto its head
3. It is just playing, so leave it and check at next week's feeding
4. Keeping it swimming in the deep pool will restore its balance

AnswerA. Suspect neurological signs such as vitamin B1 deficiency, move it to a shallow land area so it cannot drown, and see a vet the same day

ExplanationSwimming tilted, circling and falling to one side indicate a central nervous system abnormality, and given the diet of mostly frozen pond smelt, vitamin B1 deficiency is the prime suspect. A crocodilian with neurological signs is at high risk of drowning, so move it as a team to a shallow land area, keep it warm, and get treatment such as vitamin B1 injections at a hospital that handles Specified Animals the same day. With no respiratory signs, a nutritional cause takes priority over infection, but confirmation is up to the vet. Ear drops have no basis, and approaching the head is itself a bite risk. Leaving it, especially in deep water, leads to drowning. Neurological signs recover with early treatment but become irreversible if left.

IssuesA single-item diet of frozen pond smelt continued for months without vitamin supplementation. The neurological signs were amateurishly judged as an ear disease, and the keeper reached for human or dog-and-cat medicine. The risk of drowning was not recognized.

ImprovementFrozen fish loses vitamin B1 during thawing, so add a vitamin supplement before feeding and combine with frozen mice. Record food type and supplements in the feeding log. Post tilting, circling and seizures as emergency signs, and set a procedure to take the animal out of the water and see a vet immediately when they appear.

A spectacled caiman (1.7 m) kept for nine years. At feeding it grips food but drops it right away, and its chewing is awkward. When food was offered with long tongs, white spots and yellow cheese-like deposits were visible on the mouth lining. Its breath is also strong. Two weeks ago it may have injured its mouth on the bones of a hard frozen rat. Water is changed every three days and is slightly cloudy.

Which is the most appropriate response?

1. Pry the mouth open and scrape off the deposits with gauze
2. Suspect mouth rot (infectious stomatitis), clean the water, and see a vet by the same day or next day for antibiotics
3. The smell is just the food, so leave it until the next feeding
4. Pour human mouthwash into the pool to disinfect the mouth

AnswerB. Suspect mouth rot (infectious stomatitis), clean the water, and see a vet by the same day or next day for antibiotics

ExplanationWhite spots and cheese-like deposits in the mouth, bad breath and dropping food are classic signs of mouth rot, a bacterial infection of a wound in the mouth. Left untreated, the infection reaches the jawbone and leads to inability to eat or sepsis, so have the mouth cleaned and treated with antibiotics at a hospital that handles Specified Animals by the same day or next day. Poor water quality aggravates oral infection, so change the water daily to keep it clean. Prying the mouth open carries an extremely high risk of bite injury; if needed, a vet does it under sedation. Leaving it lets the infection spread. Mouthwash in the pool damages skin and eyes and does nothing for the mouth. If the animal cannot eat, a same-day visit is needed.

IssuesMouth injury from hard food was not anticipated, and infrequent water changes encouraged oral infection. The early signs of dropping food and bad breath were missed and left for two weeks. The keeper did not realize the mouth can be checked from outside the cage.

ImprovementThaw food fully to avoid protruding hard bones, and make a habit of observing mouth color and deposits from outside at feeding. Do partial water changes daily, log bad breath and dropped food, and consult a vet if it continues for two days. Have the mouth and teeth checked at regular checkups.

An elderly spectacled caiman (2 m) kept for 20 years. Recently both eyes have turned cloudy white; it barely reacts when food is moved in front of it and cannot find food in the water. The area around the eyes is swollen with discharge. The basking lamp on the land area is a repurposed aquarium light, and the filter has been off with no water change for two weeks. The keeper assumes it is cataracts from old age and has done nothing.

Which is the most appropriate response?

1. It is age-related cataracts, so do not treat; just place food in front of it
2. Spray human eye drops toward its eyes from outside the cage
3. Review the water quality and lighting, and see a vet within a few days to check for eye infection or nutritional causes
4. It cannot see, so shine strong light on it day and night for stimulation

AnswerC. Review the water quality and lighting, and see a vet within a few days to check for eye infection or nutritional causes

ExplanationCloudy eyes with swelling and discharge suggest not only age-related cataracts but also bacterial conjunctivitis or keratitis from poor water quality, or eye disease from vitamin A deficiency. These improve with treatment, so have it examined at a hospital that handles Specified Animals within a few days and receive antibiotics or vitamin correction as needed. At the same time, resume water changes and filtration and switch the lighting back to a reptile UVB and basking lamp. Dismissing it as old age lets the infection spread toward blindness or systemic infection. Human eye drops sprayed from outside do not reach the eye, may be harmful depending on the ingredients, and approaching the face is dangerous in itself. Strong light day and night irritates the eyes and disrupts the circadian rhythm.

IssuesWater quality management was abandoned with the filter off and no water change for two weeks, and the repurposed aquarium light was unsuitable equipment; together they caused the eye disease. The symptoms were given up on because of age, without considering treatable causes such as infection or nutritional deficiency.

ImprovementRun the filter at all times and keep a backup for breakdowns. Use reptile UVB and basking lamps and manage the replacement cycle. Supply vitamin A through whole prey with organs or supplements. Elderly animals especially need twice-yearly checkups to evaluate eyes, kidneys and bones.

A female spectacled caiman (1.6 m) kept for eight years. In early spring, after several days of digging at the soil on the land area, this morning a fist-sized mass of red tissue was seen from outside the cage protruding from the cloaca. The tissue is starting to dry, and the animal keeps straining. Several keepers are available and a dedicated transport box is on hand.

Which is the most appropriate first action?

1. Enter the cage and push the protruding tissue back in by hand
2. Cutting off the tissue will stop the straining, so trim it with disinfected scissors
3. It will go back on its own, so return it to the pool and watch for a few days
4. Restrain it as a team so the tissue can be covered with clean moist gauze to prevent drying, and see a vet immediately

AnswerD. Restrain it as a team so the tissue can be covered with clean moist gauze to prevent drying, and see a vet immediately

ExplanationTissue protruding from the cloaca is a prolapse of the cloaca, intestine or reproductive tract, or the result of straining from egg binding, and is an emergency. The tissue dries and dies rapidly, so as a team tape the mouth and restrain the animal, cover the protruding part with clean moist gauze to prevent drying, and transport it immediately to a hospital that handles Specified Animals. Reduction and any egg treatment are done by the vet under sedation. Pushing it back by hand risks tissue damage and a bite injury, and cutting it off causes massive bleeding and fatal infection. Returning it to the pool for a few days lets the tissue die and adds infection from the water. In a breeding female, nest digging is the warning sign, and the presence of eggs needs imaging by a vet.

IssuesThe female's nest-digging in early spring was not understood as preparation for laying, so no damp soil nesting area was provided and the risk of egg binding was not anticipated. There was no set procedure for keeping the tissue moist and transporting at the same time in an emergency.

ImprovementProvide females with a damp soil nesting area before the laying season and consult the vet about signs of egg carrying. Drill the emergency transport procedure (mouth taping, transport box, contacts) once a year. Post that any cloacal prolapse means an immediate vet visit, and stock moist gauze and clean bags in the first-aid kit.

A spectacled caiman (1.5 m) kept for five years. After several days during which no one noticed that the wire guard on the basking lamp had come off, the scales on its back were found widely discolored black, with some peeling to reveal raw, weeping skin underneath. The animal had kept basking in that spot. Measuring the land area, the temperature directly under the lamp was 48°C.

Which is the most appropriate first action?

1. Cool the burn with ice water to stop the inflammation
2. Fix the lamp guard and distance, keep the water clean, and because of the burn discoloration arrange a vet visit the same day
3. The skin will be replaced at the next shed, so do nothing
4. Enter the cage and apply a thick layer of human burn ointment

AnswerB. Fix the lamp guard and distance, keep the water clean, and because of the burn discoloration arrange a vet visit the same day

ExplanationA temperature of 48°C directly under an unguarded basking lamp causes thermal burns. Crocodilians are poor at judging when to avoid a heat source and keep warming in the same spot for long periods, so burns become extensive. Black discoloration and peeling skin on the back are burn findings; the target is a vet visit the same day. First refit the lamp guard and secure the distance to prevent recurrence, and keep the water clean to prevent infection of the burn. Cooling with ice water lowers the body temperature of an ectotherm, reducing immunity and metabolism, and adds cold damage to the tissue. Relying on shedding lets the burn fester into sepsis. Entering the cage to apply ointment is a high bite risk; treatment is done by a vet with restraint.

IssuesThe detached lamp guard was not caught by daily inspection, and the actual land-area temperature was never measured. The keeper did not know that crocodilians do not move away from a heat source on their own, and the burn went unnoticed until it had spread.

ImprovementFix a wire guard on the basking lamp and install it out of the animal's reach. Measure the land-area temperature daily and adjust so it does not exceed about 35°C. Add lamp, heater and guard fixings to the morning inspection list, and observe scale color from outside at feeding.

A spectacled caiman (3 years, 1.1 m) at an exhibition facility. Visitors banged on the glass and startled it, and it charged the wall repeatedly. By evening the scales on the snout tip have peeled off, exposing red flesh with a little blood seeping out. No teeth or jawbone are exposed. The tank walls are still fully transparent with no screening.

Which is the most appropriate response?

1. Stop feeding until the wound heals and drain the water to dry it out
2. Enter the cage and rub iodine solution directly into the wound
3. Screen the walls to reduce stimulation, keep the water clean and observe, and see a vet if swelling or pus appears
4. The bleeding is minor, so do nothing and leave the walls as they are

AnswerC. Screen the walls to reduce stimulation, keep the water clean and observe, and see a vet if swelling or pus appears

ExplanationWhen startled, crocodilians charge transparent glass or mesh and lacerate the snout tip. Here no teeth or jawbone are exposed and bleeding is minor, so first remove the cause by screening the walls and warning visitors, keep the water clean to prevent infection, and observe for a few days. See a vet if swelling, pus or loss of appetite appears; if teeth or jawbone become exposed, see a vet immediately. Withholding food and water deprives it of nutrition and hydration and slows healing. Entering the cage to disinfect is a high bite risk, and strong antiseptic damages the tissue. Leaving the walls as they are leads to repeated charging and possibly a jaw fracture.

IssuesThe transparent walls were not screened, and there was no signage or supervision to stop visitors banging on the glass. The habit of charging walls when startled was not reflected in the enclosure design.

ImprovementApply screening to the lower part of the tank and at the animal's eye level, and provide a hide. Post a notice for visitors not to tap the glass and have staff patrol. Photograph the snout wound daily and set criteria for a vet visit if swelling, pus or exposed teeth appear.

Due to a lack of space at the facility, a 2-year-old and a 4-year-old spectacled caiman have been in the same cage for a week. This morning the smaller one has a deep laceration at the base of its left foreleg and is bleeding, and part of its tail tip is missing. The larger one keeps chasing the smaller one. The bleeding continues slowly and the water is clouded red. The keeper is on site with one colleague.

Which is the most appropriate first action?

1. Both enter the cage and pull the two apart with bare hands
2. Separate them immediately with a divider or another cage, restrain as a team and apply pressure to stop the bleeding, and see a vet the same day for the deep wound
3. Fights between crocodilians are natural, so leave them until the hierarchy is settled
4. Keep it in the water until the bleeding stops and check again tomorrow

AnswerB. Separate them immediately with a divider or another cage, restrain as a team and apply pressure to stop the bleeding, and see a vet the same day for the deep wound

ExplanationCrocodilians are housed singly as a rule; cohabitation leads to fighting and cannibalism. First separate them safely using a divider or the neighboring cage to prevent recurrence. A deep laceration at the base of the foreleg needs sutures and antibiotics; the target is a vet visit the same day. For the bleeding, tape the mouth and restrain as a team, then press with clean gauze. Pulling the two apart bare-handed carries an extremely high risk of human bite injury. Waiting for a hierarchy leads to worsening wounds and fatal cannibalism. Leaving it in the water lets the dirty water infect the wound and makes it impossible to monitor the bleeding. Transport in a dedicated box with several people and confirm acceptance before the visit.

IssuesThe rule of single housing was broken because of space, and two animals of different sizes were put together. Despite knowing fighting would occur, supervision was not increased, and a deep wound resulted within a week. No divider usable for separation had been prepared.

ImprovementStrictly keep one crocodilian per cage, and never plan to hold more animals than there are cages. If animals must be held close together, always separate them with a sturdy divider. Keep an emergency divider and restraint tools next to the cage and drill the procedure for fights as a team.

When closing the inner door of the double doors after cleaning, the keeper did not notice that a 6-year-old dwarf caiman (1.3 m) was next to the door and pinched the middle of its tail hard. The animal thrashed and fled into the pool, but the tail is bent unnaturally partway along and it cannot move the part beyond. Bleeding is slight. The keeper is with one colleague and a transport box is available.

Which is the most appropriate response?

1. Pull the tail to straighten it
2. The tail will regenerate, so do nothing and leave it
3. Suspect a fracture, restrain as a team, place it in the transport box, and see a vet the same day for X-rays
4. Wrap on a splint to immobilize it and check in a month

AnswerC. Suspect a fracture, restrain as a team, place it in the transport box, and see a vet the same day for X-rays

ExplanationA tail bent unnaturally after being caught in a door, with the part beyond immobile, is a fracture or dislocation of the tail vertebrae with nerve damage. Left alone, the tip dies and leads to infection or a loss like autotomy, so have X-rays taken at a hospital that handles Specified Animals the same day and let the vet decide on stabilization or, if necessary, amputation. Transport as a team with the mouth taped, in a dedicated box. An amateur pulling the tail to reduce it damages the bone and nerves further. Unlike lizards, a crocodilian's tail does not regenerate, so leaving it is wrong. A homemade splint is inaccurate, and wrapping a thrashing animal is itself dangerous.

IssuesThe basic step of confirming the animal's position before closing the double doors was skipped. There was no division of roles for watching the animal during cleaning. The door design also allowed it to be closed with the animal nearby.

ImprovementAlways call out and confirm the animal's position before closing a door, with one person watching and one operating. Install a lip or divider near the doors so the animal cannot approach. Post the hospital and transport procedure for pinch injuries and secure a hospital that can take X-rays.

A spectacled caiman (1.6 m) kept for seven years. It was given an under-thawed frozen rat still frozen in the center; the moment it bit down there was a crack and it spat the food out. Blood drips from the mouth, and one large canine-like tooth has broken off and lies on the pool bottom. The animal is lying still on the land area with its mouth slightly open. The next feeding is scheduled in three days.

Which is the most appropriate response?

1. Crocodilian teeth grow back, so leave it and check whether it can eat at the next feeding
2. Open the mouth and pull out the root of the broken tooth
3. See a vet because of the bleeding in the mouth and lost tooth, and act the same day if it cannot eat its next meal
4. Keep spraying cold water at the mouth to stop the bleeding

AnswerC. See a vet because of the bleeding in the mouth and lost tooth, and act the same day if it cannot eat its next meal

ExplanationHard, still-frozen food causes tooth fractures and jaw injury. Crocodilian teeth are replaced throughout life, but a break that leaves the root in place or damages the socket can cause oral infection and jawbone inflammation, so bleeding in the mouth and a lost tooth warrant a vet visit. If bleeding continues, the mouth will not close or it cannot eat, this becomes a same-day emergency visit. Prying the mouth open to pull the root is a high risk of bite injury and tissue damage. Leaving it because teeth regrow lets infection spread to the jaw. Spraying cold water only lowers body temperature and does nothing to stop bleeding. Prevention is thawing food fully to near room temperature before feeding.

IssuesFood was given insufficiently thawed, and its hardness was not checked. The keeper was unaware that crocodilian teeth break on hard food or metal tools, and there was no pre-feeding check. No method for checking the mouth had been set.

ImprovementThaw frozen food in the refrigerator from the day before and check by hand that it is soft to the center before feeding. Avoid hard metal forceps and hand over food with long tongs. Observe mouth color and tooth condition from outside the cage at feeding, photograph any bleeding or loss, and consult the vet.

While carrying a 4-year-old spectacled caiman (1.2 m, 12 kg) for a checkup, the keeper tried to go down the stairs holding it alone and dropped it. The animal landed jaw-first on the floor; the lower jaw is displaced sideways and the mouth will not close fully. There is bleeding from the mouth and one foreleg is bent. The animal tries to move but thrashes in pain. Two colleagues have come to the scene.

Which is the most appropriate first action?

1. Push the jaw straight by hand and put it back in the cage
2. Restrain as a team without forcing the mouth shut, place it in the dedicated transport box and see a vet right now
3. Return it to the pool and wait a few days for it to heal on its own
4. Put human painkillers in its mouth to relieve the pain

AnswerB. Restrain as a team without forcing the mouth shut, place it in the dedicated transport box and see a vet right now

ExplanationA jaw fracture from a fall with a mouth that will not close meets the criteria for an emergency vet visit. A fractured jaw prevents eating, and bleeding and infection in the mouth are life-threatening, so restrain as a team, place it in the dedicated transport box and take it right now to a hospital that handles Specified Animals. Taping a fractured jaw tightly displaces the bone further, so keep restraint minimal and follow the vet's instructions. Pushing the jaw by hand damages tissue with bone fragments and risks a bite. Returned to the pool, an animal that cannot close its mouth swallows water and drowns. Human painkillers are harmful to reptiles and the dose is unknown. Suspect a fracture in the deformed foreleg as well and hold it still in the box during transport.

IssuesA basic transport violation: a 12 kg Specified Animal carried by one person down stairs. No dedicated transport box was used and no team transport plan was made. The preparation was inadequate for a scheduled transport to a checkup.

ImprovementAlways transport in a dedicated box, with several people, along a level route. Check stairs and steps beforehand and use a cart or elevator. Confirm the mouth-taping and boxing procedure before transport. Share with everyone that a drop during transport is an emergency involving jaw and limb fractures.

A spectacled caiman (1.8 m) kept for ten years. A decorative rock placed on the pool bottom had broken, leaving a sharp edge. At feeding time there is a gash about 20 cm long on the belly, white fatty tissue is visible, and fresh blood is spreading in the water. The animal is lying quietly in the water. The keeper is with one colleague and has mouth-taping tape for restraint and a transport box.

Which is the most appropriate first action?

1. It hurts less in the water, so leave it in the pool
2. Close the wound by gluing it together with superglue
3. Restrain as a team with the mouth taped, press with clean gauze to stop the bleeding, and see a vet right now for the deep laceration
4. Spray antiseptic at the wound from outside the cage and check tomorrow

AnswerC. Restrain as a team with the mouth taped, press with clean gauze to stop the bleeding, and see a vet right now for the deep laceration

ExplanationA 20 cm laceration showing fatty tissue is a deep wound needing sutures, and ongoing bleeding meets the criteria for an emergency vet visit. First, for safety, tape the mouth and restrain as a team, then press with clean gauze to stop the bleeding. Then place it in the dedicated transport box and go right now to a hospital that handles Specified Animals for sutures and antibiotics. Left in the water, the bleeding does not stop and bacteria in the tank water cause deep infection. Superglue damages tissue and seals bacteria inside, forming an abscess. Spraying antiseptic from outside does not stop bleeding, and by tomorrow infection and anemia have progressed. Call ahead to confirm acceptance and give the species, total length, weight and permit.

IssuesA fragile decorative rock was placed in the pool, and the sharp edge went unnoticed. The basic rule of keeping the pool bottom free of gravel and rocks for easy washing was not followed. There was no daily habit of checking the pool for foreign objects or damage.

ImprovementMake the pool bottom smooth and easy to wash, with no decorations. Check the cage for damage and sharp objects every morning and inspect the bottom visually at water changes. For wounds needing sutures, keep pressure gauze, mouth tape and a transport box near the cage, and confirm the hospital's acceptance conditions.

A spectacled caiman (1.8 m) kept for 11 years. While feeding with short tongs, the keeper was slow to release the food and the animal seized the wrist along with it. There is severe pain and bleeding; the animal will not let go and has begun twisting its body to roll. One colleague is in the next room. The keeper reflexively tried to yank the arm free.

Which is the most appropriate action immediately after being bitten?

1. Pull the arm free with all your strength, then disinfect
2. Stay still, shout for the colleague, press on the eyes or snout tip to make it release, pull free quickly when the mouth opens, retreat and lock the cage
3. Stay still until the crocodilian calms down, and once it lets go wash the wound at home and watch
4. Keep punching the crocodilian's head with your free hand

AnswerB. Stay still, shout for the colleague, press on the eyes or snout tip to make it release, pull free quickly when the mouth opens, retreat and lock the cage

ExplanationIf you pull free by force when bitten by a crocodilian, the roll (death roll) widens the laceration and can even cost the arm. First stay still, move bystanders away and shout for backup. Then press hard on the eyes or snout tip to make it release, pull the hand out quickly the moment the mouth opens, get away from the animal and lock the cage. After that, apply pressure to stop the bleeding at once and go to the emergency room; always have fractures and lacerations checked and receive antibiotics to prevent infection from oral bacteria. Just waiting for the animal to calm down gets you dragged into the water, and watching at home leads to severe infection. Punching the head keeps it agitated, causing it to roll and re-bite, deepening the wound.

IssuesShort tongs were used, putting the hand close to the food during feeding. The colleague was not in the same place during feeding, and the bite-release procedure had not been drilled. The crocodilian trait of seeing hands as food was not taken into account.

ImprovementFeed with long, sturdy tongs and design the cage so food is passed in from outside. Always feed and clean with two or more people, and drill the bite-release procedure (stay still, press eyes or snout, pull when the mouth opens) with everyone. Make it a facility rule that any bite means an emergency room visit and antibiotics.

During cleaning, a colleague was bitten on the forearm by a 3-year-old spectacled caiman (1.1 m); the release succeeded. The forearm has several puncture wounds and lacerations, and blood keeps spreading through the cloth despite pressure. The colleague is pale but says it is nothing serious and tries to keep working. The animal is back in the cage and the door is locked. Clean gauze and a first-aid kit are at hand.

Which is the most appropriate response?

1. Press firmly with clean gauze to stop the bleeding, keep the arm above the heart, and send them to the emergency room immediately for antibiotics
2. They say they are fine, so apply an adhesive bandage and let them keep working
3. Rinse the wound under the tap, apply antiseptic, and go to the hospital tomorrow if it swells
4. Tie a cord tightly around the top of the arm and keep it on to stop the bleeding

AnswerA. Press firmly with clean gauze to stop the bleeding, keep the arm above the heart, and send them to the emergency room immediately for antibiotics

ExplanationEven a small crocodilian's bite causes deep punctures and lacerations, and oral bacteria cause serious infection. Bleeding that spreads despite pressure needs thorough direct pressure with clean gauze while keeping the arm above the heart, followed by an immediate emergency room visit. The rule is to check for fractures and always receive antibiotics. Letting the person continue on their own judgment lets bleeding and infection progress, and an adhesive bandage does not stop bleeding. Washing and disinfecting are necessary, but waiting until tomorrow invites severe infection. A tourniquet of cord around the arm damages nerves and blood vessels, and applied for long by an amateur leads to tissue death, so direct pressure comes first.

IssuesThe bitten person judged the wound as minor and the workplace atmosphere let them try to keep working. The rule that every crocodilian bite is treated at a hospital was not shared, and no one was designated to take charge in an accident.

ImprovementState in the facility rules that any crocodilian bite, regardless of size, means an emergency room visit and antibiotics. Stock large sterile gauze pads and elastic bandages in the first-aid kit and hold a pressure-bleeding-control course once a year. In an accident, the person in charge orders the hospital visit, and set up procedures for workers' compensation and reporting to the prefectural government.

A dwarf caiman (1.2 m) kept for four years. After a claw on its foreleg caught in a gap in the wire mesh of the land area and it thrashed, one claw on the right foreleg has been torn out at the root and is bleeding. It walks holding the foreleg up, and blood spreads thinly when it enters the water. The bleeding is only a slow ooze. The keeper is with one colleague, and the mesh gap is wide enough to fit a finger.

Which is the most appropriate response?

1. The claw will grow back eventually, so leave the mesh as it is
2. Enter the cage and press styptic powder onto the claw base with bare hands
3. Close the mesh gap, keep the water clean and observe, and see a vet if bleeding continues, swelling appears or the dragging persists
4. Drain the pool and keep it on land only until the pain subsides

AnswerC. Close the mesh gap, keep the water clean and observe, and see a vet if bleeding continues, swelling appears or the dragging persists

ExplanationMesh with gaps that catch claws causes repeated accidents, so first close the gap that caused it. Bleeding from a claw root is usually a slow ooze that stops on its own, but the nail bed is easily infected by bacteria in the tank water, so keep the water clean and see a vet for antibiotics if bleeding continues or swelling, pus or dragging persists for several days. If walking is severely impaired, a fracture is possible; see a vet the same day or within a few days. Entering the cage to press on styptic is a bite risk, and powder irritates the nail bed. Leaving the cause invites recurrence. Draining the pool dries the skin excessively, removes drinking water, and leads to dehydration and dermatitis.

IssuesThe land-area mesh had gaps wide enough to catch claws, and the safety inspection of the equipment was inadequate. The structure that could injure a thrashing animal was not checked before the animal was introduced.

ImprovementMake the land area a smooth material such as concrete or tile, and use mesh fine enough that claws and toes cannot enter. Inspect the cage for snags and sharp parts before introduction and monthly. Treat limb dragging as a possible fracture and set a rule to see a vet if it lasts several days.

Arriving early in the morning, the keeper finds the outer door of a 5-year-old spectacled caiman's (1.4 m) cage left open and the animal missing from the cage. After last night's cleaning, only the inner door may have been closed, with the outer door left unlocked. The grounds border a residential area, and there is an irrigation canal nearby. The keeper thinks, "It will cause a stir, so let's search ourselves before reporting."

Which is the most appropriate first action?

1. Search the grounds yourselves, and report only if it is not found
2. Report immediately to the police and the prefectural government, keep people away, and search as a team while warning the neighborhood
3. Ask for sightings on social media and have whoever finds it get in touch
4. Put out food, wait for it to return, and keep it quiet for a few days

AnswerB. Report immediately to the police and the prefectural government, keep people away, and search as a team while warning the neighborhood

ExplanationThe escape of a Specified Animal must be reported immediately to the police and the prefectural (or designated city) government under the Act on Welfare and Management of Animals. Lives are at stake, so delaying the report to search on your own is permitted neither legally nor for safety. Report first, keep people away, search as a team focusing on waterside areas such as the canal, and warn the neighborhood. Even when the animal is found, do not approach bare-handed; capture it in coordination with professional handlers or the police. A social media appeal is no substitute for reporting and leads members of the public to approach and get hurt. Putting out food and keeping quiet for days violates the duty to report and leaves residents exposed to bite injuries.

IssuesThe outer door lock was not checked at the end of work, and the daily door inspection had become a formality. The keeper did not understand the duty to report escapes or the contacts, creating a setup where concealment was even considered.

ImprovementAt the end of work, two people point-and-confirm the locks and record it on the checklist. Inspect the double doors and anti-escape lip every morning. Post the escape contacts (police and the prefectural department in charge) and procedure beside the cage and hold an escape drill once a year. Also set up notification and contact arrangements with neighboring residents.

The rearing room of an 8-month-old spectacled caiman juvenile (50 cm). While cleaning inside the cage, the keeper did not notice the juvenile in the shadow of the hide and stepped on it with one foot. The juvenile let out a scream-like sound, and part of its body looks dented. A little foam is coming from its mouth and its breathing is rapid. The keeper is with one colleague.

Which is the most appropriate response?

1. It is small, so pick it up, warm it in your hands and watch until tomorrow
2. It is foaming, so open its mouth and pour water in
3. Suspect chest injury, place it in a warmed box without moving it, and see a vet right now
4. If it does not look to be in pain, return it to the cage and observe

AnswerC. Suspect chest injury, place it in a warmed box without moving it, and see a vet right now

ExplanationEven a juvenile suffers rib or spinal fractures and internal injuries when stepped on. A dented body, foam from the mouth and rapid breathing indicate chest injury or bleeding from the lungs and meet the criteria for an emergency vet visit. Without moving it, place it in a transport box with towel-wrapped heat packs kept at about 28–30°C and go right now to a hospital that handles Specified Animals for imaging. Pressing on the body or picking it up to warm it damages the organs further at the fracture site. Pouring water into the mouth causes aspiration and worsens the lungs. Appearing not to be in pain is a reptile trait, as they hide pain; judging by appearance and returning it to the cage risks a sudden collapse within hours.

IssuesThe worker entered the cage to clean and moved without confirming the animal's position. The warning that even a juvenile fractures when stepped on was not kept in mind, and there was no procedure to move the animal to a safe place before cleaning.

ImprovementRedesign so cleaning can be done from outside the cage; if entering is unavoidable, move the animal behind a divider first. Before work, two people always confirm the animal's position and say it aloud. Fix the hide's position in juvenile cages to reduce blind spots.

A winter night in the tank room of a spectacled caiman (1.1 m) kept for three years. The power cord of the submersible heater ran exposed from the pool across the land area. On rounds, the keeper sees the animal stiffen right after taking the cord in its mouth; it lies motionless at the pool edge with its mouth open. The cord's insulation has been bitten through, and the breaker has not tripped. The keeper is able to call a colleague.

Which is the most appropriate first action?

1. Grab the animal at once and pull it away from the cord
2. Splash pool water on it to knock the cord out of its mouth
3. First switch off the breaker to cut the power, call for backup, then check response and breathing and see a vet
4. Film it as it is, send the video to the vet and wait for instructions

AnswerC. First switch off the breaker to cut the power, call for backup, then check response and breathing and see a vet

ExplanationAn animal stiffening with a cord in its mouth suggests electric shock, and touching the animal or the water while the current is on will electrocute a person too. First switch off the breaker to cut the power, then call for backup to secure safety. After that, check response by touching the tail tip with a long pole, and observe breathing from the movement of the flanks or throat and the color inside the mouth from outside the cage. Electric shock causes burns in the mouth and arrhythmias, and pulmonary edema can develop with a delay, so if the response is dull or breathing is irregular, see a vet right now. Grabbing the animal or splashing water while the current is on invites electrocution and bite injury. Filming and waiting leaves the current on and prolongs the danger to animal and people.

IssuesThe submersible heater cord was exposed within the animal's reach, and the possibility of it chewing the cord was not anticipated. The keeper may also not have known whether there was a ground-fault breaker or where the breaker was.

ImprovementRun power cords through conduit or protective tubing out of the animal's reach, and connect submersible equipment to a circuit with a ground-fault breaker. Post the breaker location in the room and make cutting the power the first step in the emergency procedure. Inspect equipment insulation and fixings before winter.

A 6-month-old spectacled caiman juvenile (40 cm). During a water change the level was refilled too high, completely submerging the land area and leaving nowhere to climb out. Hours later the juvenile is found limp at the surface, mouth open and struggling feebly. The land area is 20 cm underwater, and the exhausted juvenile is lying on its side. The keeper can call a colleague.

Which is the most appropriate first action?

1. Immediately lower the water level to expose the land area, take the juvenile out of the water, keep it warm with its head slightly raised, and see a vet if breathing is weak
2. Leave it in the water and wait for it to recover on its own
3. Take it out of the water and press hard on its back to make it expel water
4. Quickly add cold water to wake it up

AnswerA. Immediately lower the water level to expose the land area, take the juvenile out of the water, keep it warm with its head slightly raised, and see a vet if breathing is weak

ExplanationEven though crocodilians are aquatic, they tire and drown without a land area to rest on. Juveniles in particular have little stamina; after hours of continuous swimming they swallow water, go limp and breathe with the mouth open. Immediately drain to expose the land area, take the juvenile out of the water, keep its head slightly raised, clear secretions from the mouth and nose, and keep it warm at 28–30°C. If breathing is weak or response is dull, see a vet right now. Chest compressions are not recommended; proper temperature and a clear airway come first. Left in the water, it sinks again. Pressing hard on the back injures the ribs and organs and does not expel water. Adding cold water lowers body temperature, which can be fatal to a weakened juvenile.

IssuesNo maximum water level was set for water changes, and the layout allowed the land area to be submerged. There was no procedure to confirm the animal could climb onto land after the work, and it was left for hours. Awareness that juveniles drown easily was lacking.

ImprovementMark a maximum water line on the tank and always confirm the land area is above the surface after a water change. Install overflow piping so the level cannot rise. Add a checklist item to recheck the animal within 30 minutes after work.

A 2-year-old dwarf caiman juvenile (70 cm). The intake of the submersible filter pump has no cover, and the toes of its foreleg have been sucked in and are stuck. The animal thrashes violently, churning the surface. There is bleeding from the base of the toes, and its body is about to be dragged under. The keeper is alone but can call a colleague by phone.

Which is the most appropriate first action?

1. Grab the animal's body and tear it free by force
2. Switch off the pump to stop the suction, call a colleague to free it as a team, and decide on a vet visit based on bleeding and any fracture
3. Draining all the water will free it naturally, so start draining first
4. Wait until it stops thrashing before freeing it, and let the wound heal in the water

AnswerB. Switch off the pump to stop the suction, call a colleague to free it as a team, and decide on a vet visit based on bleeding and any fracture

ExplanationWhen caught in an intake, first switching off the power to stop the suction halts further toe damage and the progression toward drowning. Next call for backup, restrain as a team with the mouth secured, and free the toes. Press on bleeding with clean gauze, and if there is toe deformity, swelling or dragging, suspect a fracture and see a vet the same day. Skin lacerations are easily infected by bacteria in the tank water, and deep wounds need antibiotics. Tearing it free by force severs the toes and gets you bitten by the thrashing animal. Draining takes time, during which suction and bleeding continue. Waiting for the thrashing to stop risks drowning, and leaving the wound soaking in water leads to infection.

IssuesThe filter pump intake was installed with no cover or sponge, at a size a juvenile's toes could enter. The keeper did not know the safety measures for submersible equipment or the location of the emergency stop switch.

ImprovementAlways fit a fine cover or sponge on submersible pump intakes, place them out of the animal's reach, or switch to an external filter. Group the equipment power switches within reach outside the tank and post that cutting the power is the first step in an emergency. Check for detached covers at the morning inspection.

The outdoor enclosure at an exhibition facility. While a 10-year-old saltwater crocodile (3.5 m) basks on the land area, a visiting elementary-school child has crawled under the fence into the inner walkway and is about to reach toward the cage mesh. The crocodile has slowly turned its head in that direction. The keeper spots this from 10 m away. The parent has not noticed.

Which is the most appropriate first action?

1. Shout loudly to startle the child into running away
2. Throw food to the crocodile to distract it, then call the child
3. Take a photo and report to the facility manager before responding
4. In a calm voice tell the child to stop and stay still, approach, quietly guide them outside the fence, and report to the parent and the facility

AnswerD. In a calm voice tell the child to stop and stay still, approach, quietly guide them outside the fence, and report to the parent and the facility

ExplanationCrocodilians react to movement and will bite fingers or hands within reach even through mesh. Stopping the child before touching the mesh is the top priority, but a loud shout can startle the child into a panicked fall, or the crocodile may react to the movement and charge. Say calmly, "Stay right there, don't move," approach quickly, take the child's hand and quietly guide them outside the fence. Then explain to the parent, and have the facility inspect the entry route and file a report. Throwing food raises the crocodile's activity level, and feeding outside scheduled times adds danger. Taking a photo or reporting first wastes time; it is too late once an accident happens.

IssuesThere was a gap between the fence and the cage that a child could crawl under, and the layout let visitors reach the mesh. Guard placement and patrols were inadequate, and warnings had not reached the parents.

ImprovementMake the fence high and built so it cannot be climbed or crawled under, with ample distance from the mesh. Install a double barrier that no one can approach, and eliminate blind spots with cameras and patrols. Post visitor warnings at children's eye level too, and drill staff in emergency response.

Late at night, after an earthquake of upper 5 on the Japanese intensity scale, the keeper rushes to the facility and finds part of the mesh on a 7-year-old spectacled caiman's (1.6 m) cage warped and the inner door bolt bent so it will not close fully. The animal is safe in the pool inside the cage but is agitated with its mouth open. The outer door is intact and locked. The keeper is with one colleague, and there is no power outage.

Which is the most appropriate first action?

1. Enter the cage and repair the mesh and bolt right away
2. Confirm the animal is inside the cage and the outer door is locked, reinforce temporarily from outside and restrict access, report to the prefectural government and arrange repairs
3. Leave it for a few days until things calm down and deal with it after the aftershocks subside
4. Move the animal bare-handed to another room and start repairs

AnswerB. Confirm the animal is inside the cage and the outer door is locked, reinforce temporarily from outside and restrict access, report to the prefectural government and arrange repairs

ExplanationAfter an earthquake, preventing escape is the top priority. First confirm visually that the animal is inside the cage and recheck that the intact outer door is locked. Reinforce the warped inner door and mesh temporarily from outside the cage with boards or hardware, and restrict access to the area. If a Specified Animal enclosure may no longer meet the standards, report to the prefectural government and have a contractor repair it promptly. Entering a cage with an agitated, open-mouthed animal to make repairs leads directly to a bite injury. Leaving it for days risks aftershocks widening the damage and an escape. Moving it bare-handed to another room violates basic transport rules, and that room is not an approved Specified Animal enclosure.

IssuesNo procedure or materials had been prepared for inspecting and temporarily reinforcing cages after a disaster such as an earthquake. Whether the outer door alone could hold if the inner door was damaged had not been considered, and the criteria for reporting to the prefectural government were not shared.

ImprovementCreate a post-disaster inspection checklist covering cage, doors, bolts and power in that order. Keep boards, wire and padlocks for emergency reinforcement beside the cage. Post the contact for reporting facility damage to the prefectural government and reconfirm the escape reporting system. Hold a disaster drill once a year.

Returning from a checkup, in the facility parking lot the transport box latch came loose and a 4-year-old spectacled caiman (1.3 m) got out and ran into the shrubbery. The mouth tape is coming loose. There are two keepers; several members of the public nearby have started filming with their phones. A road and a storm drain are close by.

Which is the most appropriate first action?

1. Move bystanders away, keep the animal in sight with both keepers watching, report immediately to the police and the prefectural government, and call for capture equipment and backup
2. Ask the people filming to help, and have everyone surround the shrubbery and drive it out
3. Have one person jump on it and pin it down before it gets into the drain
4. It is on the facility grounds so no report is needed; catch it with staff only

AnswerA. Move bystanders away, keep the animal in sight with both keepers watching, report immediately to the police and the prefectural government, and call for capture equipment and backup

ExplanationEven during transport, the moment the animal is outside the facility's cage it counts as an escape of a Specified Animal, and there is a duty to report immediately to the police and the prefectural government. First move the public away and have both keepers keep the animal in sight. With the mouth tape coming loose it can use its full bite force, so one person jumping on it would mean a serious bite injury. Call the facility for capture equipment (poles, ropes, restraint board) and backup, and capture as a team in coordination with the police. Involving the public carries a high risk of bite injuries and is legally the manager's responsibility. Even on the grounds, outside the cage is an escape, and handling it with staff alone without reporting breaches the duty.

IssuesInspection of the transport box latch and confirmation of the mouth taping were inadequate. Loading and unloading was done in a parking lot where the public was present, and escape response was not part of the transport plan.

ImprovementUse double latches and locks on the transport box, checked by two people before departure and after arrival. Load and unload at a place and time with no public present. Carry capture and restraint equipment in the vehicle during transport and keep the escape reporting contacts on hand. State the division of roles in case of escape in the transport plan.

After feeding a frozen rat to a spectacled caiman (1.5 m) kept for five years, the keeper notices while tidying up that one pair of metal feeding tongs (40 cm) is missing. The keeper has a feeling of having seen the animal seize the tongs along with the food and pull them in. The animal is resting quietly in the pool as usual. The keeper is with one colleague.

Which is the most appropriate response?

1. It will be digested with the food, so leave it and check the feces in a few weeks
2. Pour salt water into its mouth to make it vomit
3. Feed a large amount of food to push it through
4. Assume ingestion, see a vet the same day, locate the tongs by X-ray and follow the vet's judgment

AnswerD. Assume ingestion, see a vet the same day, locate the tongs by X-ray and follow the vet's judgment

ExplanationCrocodilians sometimes swallow tongs, gloves and other tools along with food; metal tongs are not digested and can perforate the stomach or intestine. When tools are counted after feeding and one is missing, assume ingestion, have X-rays taken at a hospital that handles Specified Animals the same day, and let the vet decide whether endoscopic or surgical removal is needed. Leaving it and waiting for feces means a perforation or obstruction over the following weeks would be invisible from outside. Pouring salt water into the mouth risks a bite and aspiration, and is not an established way to induce vomiting in crocodilians. A large meal shifts the tongs in the stomach and spreads the damage.

IssuesThe risk of the animal seizing tools together with food was not anticipated, and the timing of releasing food and handling of tools were inadequate. There was a habit of counting tools after feeding, but no response to ingestion had been decided.

ImprovementUse feeding tools that are long, sturdy, and too large or awkward for the animal to swallow, and withdraw them as soon as the food is handed over. Have two people count tools and gloves after feeding. Post the policy of same-day X-rays for ingestion and secure a hospital that can do them.

A dwarf caiman (1.4 m) kept for eight years. During a water change, a part-time worker poured undiluted chlorine bleach used for scrubbing the tub into the pool. A strong chlorine smell rises from the pool, and the animal has its eyes closed and mouth open, thrashing violently at the surface and trying to climb onto land. Its skin looks red. The keeper arrives at once and can call a colleague.

Which is the most appropriate first action?

1. Drain immediately, flush with large amounts of fresh water, move the animal safely to the land area, watch the eyes and skin, and see a vet the same day
2. Add an acidic cleaner to neutralize it
3. Wait for the animal to calm down and change the water tomorrow
4. Enter the cage, pick the animal up and wash its whole body in the shower

AnswerA. Drain immediately, flush with large amounts of fresh water, move the animal safely to the land area, watch the eyes and skin, and see a vet the same day

ExplanationChlorine bleach irritates the skin, eyes and airways; at high concentration it causes dermatitis, corneal damage and airway inflammation. Drain immediately and flush with large amounts of fresh water. Move the animal safely to the land area as a team, and because of the closed eyes, open mouth and red skin, have it examined at a hospital that handles Specified Animals the same day. Adding an acidic cleaner releases chlorine gas, poisoning people and animal alike. Left alone, the dermatitis and keratitis progress. Entering the cage to lift it into the shower is an extremely high bite risk; flushing is done by changing the pool water. Also ventilate the room to protect the workers.

IssuesChlorine cleaners were brought into the animal room, and the setup allowed a part-time worker to pour undiluted product into the pool. Cleaner use and rinsing procedures had not been taught, and there was no ventilation or protective gear.

ImprovementLimit cleaners used in the animal room to those safe for reptiles and ban chlorine products. If they must be used, set a procedure for thorough rinsing and drying, confirmed by a supervisor. Post worker training, protective gear requirements and the emergency drain procedure.

Summer. A pest control contractor sprayed pesticide outdoors on the property next door. The next day, a spectacled caiman (1.5 m) kept for six years is convulsing in the pool of its outdoor cage, drooling and crawling around the land area. An oily film floats on the water. The keeper is with one colleague and has a transport box and restraint tools.

Which is the most appropriate first action?

1. Watch for a while, and return to normal once the seizures stop
2. Do nothing until the pesticide's name is known; call the contractor and wait
3. Take the animal out of the water as a team, drain and wash the pool, and see a vet right now with the pesticide information
4. Put lots of ice in the pool to dilute the chemical

AnswerC. Take the animal out of the water as a team, drain and wash the pool, and see a vet right now with the pesticide information

ExplanationSeizures, drooling and crawling are classic signs of pesticide poisoning such as from organophosphates, and meet the criteria for an emergency vet visit. A seizing animal drowns in water, so first secure the mouth and take it out safely as a team, and keep it warm on a shallow land area or in the transport box. Drain and wash the contaminated pool to prevent re-exposure. Confirm the name and ingredients of the sprayed chemical with the contractor and take that information right now to a hospital that handles Specified Animals for antidotes or supportive care. Untreated seizures lead to respiratory arrest. Waiting until the chemical is identified wastes time; confirm it in parallel with treatment. Ice does not reduce the chemical already absorbed and only lowers body temperature.

IssuesThere was no advance knowledge of agrochemical or pesticide spraying on the adjacent property, and the risk of the outdoor pool being contaminated was not anticipated. No measures such as moving the animal indoors or covering the pool on spraying days were in place.

ImprovementAsk neighboring contractors and property managers to give advance notice of spraying. On spraying days, cover the pool or change the water right afterward. Check the outdoor pool surface every morning for oily film or odd smells. Include reporting the chemical name and ingredients in the poisoning emergency procedure.

While feeding a spectacled caiman (1.2 m) kept for three years, the keeper was holding the tongs with a rubber-gloved hand; the animal lunged at the food with such force that it bit and tore off the end of the glove and swallowed it with the food. The hand is unharmed, but three finger sections of the rubber glove are gone. The animal looks normal. The keeper is with one colleague.

Which is the most appropriate response?

1. The rubber is small, so leave it, check whether it passes in the feces, and see a vet if appetite or defecation changes
2. It was just swallowed, so open the mouth and pull it out with your fingers
3. Mix oil into the food as a laxative
4. Stop feeding from tomorrow and wait for it to pass naturally

AnswerA. The rubber is small, so leave it, check whether it passes in the feces, and see a vet if appetite or defecation changes

ExplanationA small, soft foreign body like the finger sections of a rubber glove is mostly passed in the feces by a crocodilian's stomach acid and muscular stomach. Unlike metal tongs there is no risk of perforation, so first check the feces daily and see a vet if signs of intestinal obstruction appear, such as refusal of food, no defecation, a distended abdomen or vomiting. This is observation, not neglect: see a vet within a few days if anything changes, or the same day with X-rays if refusal and abdominal distension appear. Opening the mouth and reaching in with fingers is extremely dangerous and leads straight to a bite. Oil risks aspiration and irritates the digestive tract, with no evidence it speeds passage in crocodilians. Stopping food slows gut motility and makes the object more likely to stall.

IssuesFeeding was done at a short distance with a gloved hand inside the animal's strike range. Awareness that gloves or tongs can be swallowed with food was low, and feeding posture and distance were not standardized.

ImprovementFeed with long tongs through a feeding port from outside the cage. Remove gloves within the animal's reach or use thick ones that cannot be swallowed. Count tools and gloves after feeding, and set criteria for logging feces and appetite for observation after any foreign-body ingestion.

A dwarf caiman (1.2 m) kept for four years. The land area is covered with pebbles, and the keeper has repeatedly seen it swallow pebbles along with food it dropped and picked up. For the past two weeks it has not eaten, and its abdomen is distended and bulging on both sides. No feces for three weeks. When it floats, its belly tilts as if about to turn upward. The keeper is with one colleague.

Which is the most appropriate response?

1. It lacks exercise, so enlarge the pool and make it swim
2. Suspect intestinal obstruction from the distended abdomen and lack of feces, and see a vet the same day for X-rays
3. Feed more to get the gut moving
4. A long soak in warm water will make it defecate, so raise the water to 35°C and wait

AnswerB. Suspect intestinal obstruction from the distended abdomen and lack of feces, and see a vet the same day for X-rays

ExplanationRefusal of food, abdominal distension and three weeks without feces after repeatedly swallowing pebbles are classic signs of intestinal obstruction by the pebbles; left alone, it dies of intestinal necrosis or perforation. Have X-rays taken at a hospital that handles Specified Animals the same day and let the vet decide between medical treatment and surgery. Swimming does not clear the obstruction and wastes its strength. More food piles up above the blockage and spreads the intestinal damage. Water at 35°C exceeds the upper body-temperature limit and, far from moving the gut, risks heatstroke. Wild crocodilians do swallow gastroliths, but in captivity covering the land area with pebbles is itself a cause of ingestion.

IssuesThe land area was covered with pebbles, and despite repeatedly seeing them swallowed with food, the environment was not changed. Refusal of food and no feces for 2–3 weeks went without a vet visit, and the clear sign of abdominal distension was dismissed.

ImprovementMake the land area concrete or tile, materials that cannot be swallowed, and put no gravel in the pool. Feed in a spot free of pebbles and foreign objects. Log defecation and feeding every time and set a rule to see a vet after two weeks without feces or two weeks of refusal.

A January night. Heavy snow has cut power to the facility. In the tank room of a spectacled caiman (1.7 m) kept for nine years, both the heating and the submersible heater have stopped, and in three hours the water has dropped from 28°C to 22°C. Restoration is not expected before morning. The room temperature is forecast to fall to 15°C, and the animal is motionless in the water. There is no generator, but there is a cartridge gas heater and disposable hand warmers.

Which is the most appropriate response?

1. Throw hand warmers directly into the water to raise the temperature
2. Do nothing until morning and restart the heater once power returns
3. Run the gas heater with ventilation to hold the room temperature, lower the water level so the animal does not chill too much, and log the temperature until morning
4. Pour boiling water into the pool to bring it straight back to 28°C

AnswerC. Run the gas heater with ventilation to hold the room temperature, lower the water level so the animal does not chill too much, and log the temperature until morning

ExplanationProlonged cold lowers a crocodilian's immunity and causes respiratory infection; below 15°C digestion stops and it becomes unable to move. During an outage, the basic principle is to keep the whole room from cooling: warm it with the gas heater while ensuring ventilation, and lower the water level to reduce the water's thermal mass so it cools more slowly. Place towel-wrapped heat packs on the land area, arranged so the animal cannot touch them directly. Log the temperature hourly, and if open-mouth breathing or mucus appears, see a vet after power returns. Hand warmers thrown in may be swallowed or cause burns, and do not generate heat underwater. Doing nothing lets it cool to nearly 15°C by morning. Boiling water causes local burns and shock from the sudden temperature change.

IssuesNo plan or supplies (generator or backup heat source) had been prepared for keeping warm during a winter outage, and the facility could not cope with a long restoration time. How fast the water temperature falls was unknown, so the response started late.

ImprovementBefore winter, document an outage warming plan and prepare a generator or portable power station with wiring for the submersible heater. Drill gas heating and ventilation procedures and the use of heat packs. Set a threshold to begin the response when the water drops below 24°C, and keep a temperature log sheet ready.

An August afternoon, 38°C and extreme heat. In the outdoor enclosure, the pool of an 8-year-old saltwater crocodile (3 m) has reached 34°C in direct sun and the water is cloudy green. The animal lies still on the shadeless land area with its mouth wide open, eyes closed and barely responsive. There is no shade cover, and the water is changed once a week. The keeper can work with one colleague.

Which is the most appropriate first action?

1. Dump in a large amount of cold water at once to bring the water down to 20°C
2. Immediately set up shade to block direct sun, add fresh water gradually to lower the water temperature, and see a vet if it does not respond
3. Crocodiles tolerate heat, so wait until evening without changing the water
4. Place ice directly on the animal to cool it

AnswerB. Immediately set up shade to block direct sun, add fresh water gradually to lower the water temperature, and see a vet if it does not respond

ExplanationCrocodilians shed heat by opening the mouth, but with no shade and no cool water their body temperature keeps rising into heatstroke. Poor response and closed eyes are danger signs; first set up shade to block direct sun, then add fresh water gradually to bring the water below 30°C. Green cloudy water means bacteria have multiplied in the heat, so the water change also prevents dermatitis. If response does not return or the mouth stays open after this, see a vet the same day. Dropping to 20°C at once with cold water causes shock from the sudden change. Assuming heat tolerance and waiting until evening lets the heatstroke progress. Ice placed directly overcools locally, and approaching the animal is a bite risk.

IssuesThe outdoor cage had no shade and no shaded refuge for the animal in extreme heat. Water quality deteriorates fast in summer, yet changes were weekly and there was no habit of measuring water temperature. The heat limit was not known.

ImprovementInstall permanent shade and a shaded hide in outdoor cages. In summer, measure the water temperature morning and evening and set a rule to change water and add shade above 30°C. Increase summer water changes to at least every 2–3 days and top up with fresh water on extreme heat days. Post the signs of heatstroke (poor response, closed eyes).

A large typhoon is forecast to approach. The facility's outdoor cage holds a 6-year-old spectacled caiman (1.5 m). The cage sits beside a river and has flooded before. An evacuation advisory is expected tomorrow. There is no spare indoor enclosure, but a transport box and restraint tools are available. The keeper thinks, "The cage is sturdy, so leave the animal and just evacuate the people."

Which is the most appropriate response?

1. Trust the cage, leave the animal in place and evacuate only the people
2. Carry the animal to the bathroom at home and keep it there temporarily
3. Loosen the cage bolt so it can escape on its own if the water comes
4. Because flooding could break the cage and cause an escape, consult the prefectural government in advance and transport it to a safe place within a permitted facility or secure a receiving facility

AnswerD. Because flooding could break the cage and cause an escape, consult the prefectural government in advance and transport it to a safe place within a permitted facility or secure a receiving facility

ExplanationAn outdoor cage beside a river with a flooding history carries a serious risk of a Specified Animal escaping during a typhoon through cage damage or rising water. Because an escape endangers lives, consult the prefectural department in charge as soon as the typhoon's approach is known, and arrange in advance either a move to a safe place within the permitted facility or a receiving facility such as another permitted facility or zoo. Transport as a team with the mouth taped, in a dedicated box, before the wind and rain strengthen. Trusting the cage and leaving it risks escape if the cage breaks in the flood, and drowning if submerged. A home bathroom is not an approved Specified Animal enclosure and invites bite injuries to the family. Loosening the bolt is a deliberate release and a violation of the law.

IssuesThe outdoor cage was sited in a place with a flooding history, with no evacuation destination or transport plan for disasters. The judgment that the sturdy cage was enough underestimated the escape risk of a Specified Animal. There had been no advance consultation with the prefectural government.

ImprovementDocument a disaster evacuation plan in consultation with the prefectural government and secure facilities that can receive the animal, with contacts. Set criteria for deciding on transport at the forecast stage of a typhoon or heavy rain (warnings issued, evacuation advisories, etc.). Review the outdoor cage's location and consider relocating to a non-flooding site or an indoor facility.

February. With the heating turned up, the humidity in the animal room has dropped to 20%. A dwarf caiman (1.3 m) kept for five years has recently spent long periods on the land area; the edges of the scales on its back are dry and white, cracking and starting to peel. The pool is small and cannot submerge the whole body. The skin around the eyes also looks dry and flaking. It is eating.

Which is the most appropriate response?

1. Enter the cage and apply moisturizing cream to its back
2. Raise the humidity to 60–80%, improve the pool so the whole body can submerge, and see a vet if ulcers or redness appear on the skin
3. Dryness is a sign of upcoming shedding, so do nothing
4. Raising the room temperature will raise the humidity too, so turn up the heating

AnswerB. Raise the humidity to 60–80%, improve the pool so the whole body can submerge, and see a vet if ulcers or redness appear on the skin

ExplanationA crocodilian's skin is maintained by water and high humidity; at 20% humidity with a pool too small to submerge in, the scales dry and crack, leading to dermatitis and dry eyes. First restore 60–80% humidity with a humidifier or a larger pool, and provide a pool the whole body can submerge in. If redness, ulcers or scale loss spread from the cracked areas, bacterial infection is suspected, so see a vet within a few days. Entering the cage to apply cream is a bite risk and its effect on the skin is unknown. Crocodilians shed in patches; white, dry cracking is not shedding. Turning up the heating dries the air further and lowers humidity. A dry land area is necessary, but only alongside a proper pool.

IssuesThere was no hygrometer, so the extreme drop in humidity from winter heating went unnoticed. The pool could not submerge the whole body, which also falls short of keeping standards. The scale changes were mistaken for shedding.

ImprovementInstall a hygrometer, log it morning and evening, and keep 60–80% with a humidifier. Rebuild the pool to several times the total length, deep and wide enough to submerge the whole body. Photograph the skin at feeding and consult the vet about changes in cracking or redness.

An earthquake has cut the facility's water supply, with restoration expected in three days. The pool of a spectacled caiman (1.6 m) kept for seven years still has the filter running, but leftover food and feces are gradually clouding it and foam is forming on the surface. The only drinking water stockpiled is ten 2 L bottles for people. The air temperature is 28°C and the heating is working. Feeding was done yesterday.

Which is the most appropriate response?

1. Drain the pool completely and keep it on the land area alone for three days
2. Stop feeding to protect water quality, remove feces and leftovers daily, secure a water truck or nearby water source, and continue partial water changes
3. Ignore the dirt and do nothing until restoration in three days
4. Pour in all the drinking water and do one full change

AnswerB. Stop feeding to protect water quality, remove feces and leftovers daily, secure a water truck or nearby water source, and continue partial water changes

ExplanationDuring a water outage the most important thing is to slow the deterioration of water quality. Leftover food and feces are the main sources of contamination, so stop feeding until restoration (a healthy adult tolerates several days of fasting) and remove feces and leftovers daily. Secure a water source such as a water truck, a nearby well or a storage tank and continue partial changes, even small ones, to lower the concentration of harmful substances. Do not stop the filter. Draining the pool completely dries the skin, dehydrates the animal and leaves it unable to drink; it will not last three days. Doing nothing lets bacteria multiply into dermatitis and systemic infection. 20 L of drinking water is not enough for a full change, and the reduced volume concentrates the dirt. If redness or ulcers appear from poor water quality, see a vet after restoration.

IssuesThere was no stockpile of water or plan for an alternative source in case of an outage, and drinking water alone was insufficient for water changes. Procedures for stopping feeding and maintaining water quality in a disaster had not been set, relying only on filtration.

ImprovementStockpile water for changes in large containers or a rainwater tank for disasters, and confirm whom to ask for a water truck. Document the outage procedure (stop feeding, remove waste, partial changes). Keep a water test kit and check ammonia levels during the outage.

A parent and 5-year-old child visiting the facility were allowed by the keeper to play with their hands in a bucket of water during a water change. The child then ate snacks without washing. Two days later the parent calls to say the child is at the doctor with high fever, vomiting and diarrhea. The keeper is about to answer that it has nothing to do with the crocodile.

Which is the most appropriate response for the facility?

1. Say it is unrelated to the crocodile and have nothing more to do with it
2. Tell the parent that infection from the tank water, such as Salmonella, is possible, advise them to tell the doctor about the reptile contact, and review the facility's hygiene management
3. Say nothing until it is confirmed whether anyone else has had the same symptoms from the tank water
4. Euthanize the crocodile just in case

AnswerB. Tell the parent that infection from the tank water, such as Salmonella, is possible, advise them to tell the doctor about the reptile contact, and review the facility's hygiene management

ExplanationSalmonella is normally present in crocodilian feces, tank water and on the body surface, and putting unwashed hands in the mouth causes fever, vomiting and diarrhea. Children aged 5 and under are especially prone to severe illness. Advise the parent to tell the doctor about the contact with the reptile and tank water, so it can guide testing and antibiotic choice. The facility should eliminate visitor contact with tank water, provide hand-washing facilities and signage, and consult the public health center if needed. Dismissing it as unrelated delays the child's diagnosis. Staying silent until symptoms are confirmed in others is ethically wrong and does nothing to prevent secondary infection. Euthanizing the animal reflects a misunderstanding of the source; the issue is managing the tank water and hand washing.

IssuesThe keeper allowed a visitor, a small child at that, to touch the tank water. The risk of zoonoses such as Salmonella was not understood and no hand-washing guidance was given. A bucket in use was left within visitors' reach.

ImprovementSet up routes and barriers that keep visitors away from tank water, tools and animals, and post warnings for children aged 5 and under, the elderly and pregnant women. Direct visitors to wash hands after the tour and install a sink and sanitizer. Staff should study the transmission routes and prevention of Salmonella, Leptospira and similar once a year.

A part-time worker at the facility cleaned the pool of a spectacled caiman (1.5 m) kept for seven years with a cut on the hand, bare-handed and in sandals. The water was cloudy with the crocodile's urine and feces. Five days later the worker calls to report high fever, muscle pain and red eyes, and says they are taking cold medicine and resting. The keeper is the facility's manager.

Which is the most appropriate response as the manager?

1. It is a cold, so give them a few days off and have them return when recovered
2. Just in case, discard all the tank water and wash the crocodile with disinfectant
3. Because infection from the tank water such as leptospirosis is possible, instruct them to see a doctor immediately and report having touched reptile tank water with a cut hand
4. It is the worker's own responsibility, so the facility stays out of it

AnswerC. Because infection from the tank water such as leptospirosis is possible, instruct them to see a doctor immediately and report having touched reptile tank water with a cut hand

ExplanationTouching water contaminated with crocodilian urine and feces with a cut hand can cause infections such as leptospirosis. High fever, muscle pain and red eyes are typical early symptoms, and if left it can progress to kidney failure or liver damage. The manager must have the worker see a doctor immediately and report the exposure to reptile tank water. Early antibiotic treatment matters; resting on cold medicine invites severe illness. Discarding the water does nothing to treat the worker, and washing the crocodile with disinfectant is dangerous for both animal and worker. Infection at work is a workplace injury; staying out of it on the grounds of personal responsibility breaches the facility's duty of care. Enforce protective gear.

IssuesWork was permitted bare-handed and in sandals, with no protective gear, despite a cut on the hand. Workers were not taught that the tank water may contain pathogens such as Leptospira or how infection enters through wounds. Rules for reporting illness and seeing a doctor were unclear.

ImprovementMake gloves, boots and a waterproof apron where needed mandatory for pool work, and bar anyone with a cut on the hand from the work. Enforce hand washing and disinfection afterward. Post the symptoms of infections from tank water (high fever, muscle pain, red eyes) and make it known that anyone with symptoms must see a doctor at once and report the exposure.

A spectacled caiman (6 years, 1.5 m) transferred from another zoo has arrived at the facility. There is no health certificate from the previous facility and no fecal test has been done. The animal looks healthy on arrival, but the keeper plans to put it straight into the empty cage next to the existing animals and to work with the same nets and cleaning tools. There are three existing animals, all healthy.

Which is the most appropriate response?

1. It looks healthy, so put it in the neighboring cage as planned and share the tools
2. Put it in the same pool as the existing animals to get it settled
3. Soak it in disinfectant water together with the existing animals right after arrival
4. Set a quarantine period in a separate room with dedicated tools, and move it to permanent housing only after fecal tests and a health check

AnswerD. Set a quarantine period in a separate room with dedicated tools, and move it to permanent housing only after fecal tests and a health check

ExplanationA new arrival can carry parasites and bacteria even if it looks healthy, and they spread to existing animals through feces and tank water. At intake, set a quarantine period (1–3 months) in a separate room, use dedicated cleaning tools and nets, and work from the healthy existing animals first. Have fecal tests and a vet's health check on arrival and at the end of quarantine, and move it to permanent housing only after confirming no problems. Shared tools carry infection directly. Housing in the same pool invites not only infection but fighting and cannibalism, against the rule of single housing for crocodilians. Soaking the animal in disinfectant damages skin and eyes, does nothing for internal parasites, and handling several animals together is also a bite risk.

IssuesAn animal with no health certificate was to be housed next to existing animals without quarantine, sharing tools. No fecal test results or medical history were requested from the sending facility, and the risk of infection spreading through the whole facility was not considered.

ImprovementWrite an intake procedure making a quarantine room, dedicated tools, fecal tests and a health check mandatory. Obtain diet, medical history and test results in writing from the sending facility. Fix the work order as healthy animals first, then quarantined animals, and log hand washing and tool disinfection after work.

A spectacled caiman (10 years, 1.7 m) is kept at a permitted private facility. At every water change, the keeper, finding it easier, has been pouring the bucketed tank water down the kitchen sink at home and washing the buckets in the kitchen too. Family members have recently had repeated bouts of diarrhea. The household includes an infant and an elderly parent.

Which is the most appropriate response?

1. Pour tank water into an outdoor drain or a dedicated drain, wash tools in a dedicated place rather than the kitchen, and have the family consult a doctor about their symptoms
2. Wiping the kitchen with disinfectant makes it fine, so carry on
3. Boil the tank water before pouring it down the kitchen sink
4. The family's diarrhea is unrelated, so continue as before

AnswerA. Pour tank water into an outdoor drain or a dedicated drain, wash tools in a dedicated place rather than the kitchen, and have the family consult a doctor about their symptoms

ExplanationCrocodilian tank water and feces contain Salmonella and parasite eggs; pouring them down the kitchen sink contaminates dishes and the cooking area and infects the family orally. Infants and the elderly are prone to severe illness. Pour tank water into an outdoor drain or a dedicated drain in the animal room, wash buckets and nets at a dedicated washing station, and never bring them into the kitchen. Always wash hands after work. If the family's diarrhea continues, have them tell the doctor about the reptile and seek advice. Wiping the kitchen leaves contamination from splashes and tools. Boiling reduces bacteria but is laborious and risky, and handling it in a food area is wrong in itself. Dismissing it as unrelated lets the family's health damage continue.

IssuesTank water and tools were handled in the kitchen, creating a route for zoonotic infection. Despite an infant and an elderly person, both vulnerable, living in the home, no thought was given to separating animal care from living space. The link between the family's symptoms and the animal was not suspected.

ImprovementInstall a dedicated drain and washing station in the animal room and never take tools out of it. Wash hands and change clothes after work, and keep infants and the elderly out of the animal room. Explain reptile-borne infections to the family and tell the doctor about the animal if anyone has diarrhea or fever.

A winter morning. A dwarf caiman (1.3 m) kept for six years is floating belly-up in the shallow part of the pool. The heater has failed and the water is 18°C. Touching the tail tip with a long pole gets no response. The flank moves only slightly, about once a minute. The mouth is slightly open and the lining inside is pale bluish. The keeper is with one colleague and has a transport box and heat packs.

Which is the most appropriate first action?

1. Take it out of the water, warm it gradually to 28–30°C on a shallow land area or in the transport box, clear secretions from mouth and nose, keep the head slightly raised and contact the hospital
2. Press hard on the chest and repeat chest compressions
3. Judge it dead and dispose of it
4. Soak it in hot water to raise its body temperature quickly

AnswerA. Take it out of the water, warm it gradually to 28–30°C on a shallow land area or in the transport box, clear secretions from mouth and nose, keep the head slightly raised and contact the hospital

ExplanationAn unresponsive animal with extremely slow breathing in the cold is in a state of hypothermia with a depressed metabolism; it can look dead and still recover. Chest compressions are not recommended for crocodilians; first take it out of the water to prevent drowning, then warm it gradually to 28–30°C on a shallow land area or in the transport box. Clear secretions from the mouth and nose and keep the head slightly raised to maintain the airway. While doing this, contact a hospital that handles Specified Animals and go right now. A pale lining is a danger sign of oxygen shortage; watch whether breathing recovers with warming. Pressing on the chest injures the ribs and organs with no expected benefit. Judging it dead and disposing of it is premature; confirmation of cardiac arrest is for the vet. Rapid warming in hot water causes burns and shock.

IssuesThere was no system to detect heater failure in winter, and the drop to 18°C went unnoticed overnight. The keeper did not know that crocodilians enter a state of suspended animation in the cold, and could easily have misjudged it as dead.

ImprovementInstall a water temperature alarm and keep a spare heater; make morning and evening water temperature checks mandatory in winter. Post how to check response, breathing and mouth color, and a resuscitation procedure that prioritizes warming and airway over chest compressions. Confirm in advance which hospitals accept patients at night.

10 p.m. A spectacled caiman (1.7 m) kept for eight years has cut the base of its foreleg deeply on damaged cage mesh. Blood keeps seeping despite pressure with gauze, and white tissue is visible. The regular vet is closed, and the after-hours hospital is an hour's drive away. The keeper is with one colleague and has mouth tape, a transport box and a vehicle.

Which is the most appropriate response?

1. Hold gauze on it and watch until morning, waiting for the regular vet to open
2. Pack the wound with flour or styptic powder to harden it
3. Keep applying pressure, phone the after-hours hospital to confirm acceptance, tape the mouth and transport it in the box as a team
4. The water pressure will stop it if it is in the pool, so return it to the water

AnswerC. Keep applying pressure, phone the after-hours hospital to confirm acceptance, tape the mouth and transport it in the box as a team

ExplanationBleeding that does not stop with pressure and exposed tissue meet the criteria for an emergency vet visit; waiting until morning lets blood loss and infection progress. First keep pressing with clean gauze, and phone the after-hours hospital with the species, total length, weight and wound condition to confirm acceptance. Then tape the mouth, place it in the dedicated transport box and transport it as a team, dark and quiet. Sutures and antibiotics are needed. Flour or styptic powder remains as a foreign body inside the wound, causing infection and hindering suturing. Returned to the pool, pressure cannot be applied and bacteria in the water cause deep infection. Keep pressing during the hour-long drive, and wrap heat packs in a towel so they do not touch the animal directly.

IssuesThe damaged mesh was not caught by routine inspection, and the sharp part injured the animal. No after-hours hospital had been identified in advance, leaving the keeper unsure about nighttime transport. The limits of pressure bleeding control were not understood.

ImprovementInspect cage mesh and doors every morning and repair damage the same day. Confirm several hospitals that accept Specified Animals at night and on holidays and post their phone numbers. Drill bleeding control, restraint and transport once a year, and keep a transport box and pressure gauze in the vehicle.

A spectacled caiman (1.2 m) kept for three years has been completely motionless for 30 minutes with only its eyes and nostrils above the surface. Trying to check its breathing, the flank movement is hard to see and seems to come only once every few tens of seconds. Water 28°C, air 30°C, and the inside of its mouth was pink at yesterday's feeding. The keeper, new to this animal, is worried it might be dead and is about to enter the cage to check.

Which is the most appropriate response?

1. Enter the cage and shake its body to check for a response
2. Resting at the surface and breathing once every few tens of seconds is within normal range; check its response from outside the cage by touching the tail tip with a long pole
3. Breathing is infrequent, so hold an oxygen cylinder to its mouth
4. Drain the pool, get it onto land and force it to move to stimulate breathing

AnswerB. Resting at the surface and breathing once every few tens of seconds is within normal range; check its response from outside the cage by touching the tail tip with a long pole

ExplanationCrocodilians are ambush predators, and resting motionless for long periods with only the eyes and nostrils above the surface is normal behavior. Breathing once every few tens of seconds to once every few minutes is normal and can be confirmed by slight movement of the flanks or throat. At proper temperature with a pink mouth, there is nothing abnormal. To check its response, touch the tail tip from outside the cage with a long pole; if it moves, there is no problem. Entering the cage to shake it is extremely dangerous, as a resting animal bites reflexively. Oxygen at the mouth is unnecessary and approaching is dangerous in itself. Draining and forcing it to move causes stress and needless exhaustion. The signs of trouble are open-mouth breathing, mucus, tilting, and sinking without being able to float.

IssuesThe new keeper did not know the normal resting behavior and breathing rate of crocodilians and, out of worry, was about to enter the cage. The method of checking the animal from outside (touching the tail tip with a pole) had not been taught.

ImprovementTeach new keepers the difference between normal behavior (resting, infrequent breathing, mouth gaping) and abnormal signs. Post the procedure for checking from outside the cage with a long pole and prohibit entering the cage as a rule. Make a habit of recording mouth color and response at every feeding.

A spectacled caiman (1.4 m, 15 kg) kept for five years is having whole-body seizures on the land area, repeatedly opening and closing its mouth and snapping at its surroundings. The hospital has said to bring it in right away. The keeper is with one colleague and has a dedicated transport box, mouth tape, a thick towel and heat packs. The colleague is in a hurry, saying, "Let's pick it up and box it while we can."

Which is the most appropriate transport preparation?

1. Lift it as a pair while the seizure weakens and put it in the box without taping
2. Do not approach while the mouth keeps snapping; cover the eyes with a towel to calm it, then tape the mouth, box it, wrap the heat packs in a towel and transport dark and quiet
3. Put human anticonvulsants in its mouth to stop the seizure before transport
4. Transport is dangerous, so decline the hospital's instruction and wait for it to recover in the cage

AnswerB. Do not approach while the mouth keeps snapping; cover the eyes with a towel to calm it, then tape the mouth, box it, wrap the heat packs in a towel and transport dark and quiet

ExplanationA seizing crocodilian snaps at anything, so do not approach while the mouth is opening and closing. Covering the eyes with a thick towel reduces visual stimulation and calms it; in that state, several people tape the mouth from behind the head and then place it in the dedicated transport box. Wrap the heat packs in a towel so they do not touch it directly, and transport dark and quiet. Lifting it without taping gets someone bitten during transport, and a seizing, thrashing animal gets dropped, fracturing the jaw or limbs. Human anticonvulsants have unknown safety in reptiles, and putting anything in the mouth is dangerous in itself. Seizures meet the criteria for an emergency vet visit; declining the hospital's instruction and waiting in the cage loses the chance of recovery. Keep it out of water during the move to prevent drowning.

IssuesThe colleague did not recognize the danger of approaching a seizing animal and tried to skip the restraint steps in a hurry. Transport preparation (covering the eyes, taping the mouth, boxing) had not been drilled, and the procedure was not shared for emergencies.

ImprovementPost the mouth-taping and boxing procedure with photos and drill it once a year with the actual equipment. Make the rule for seizures: do not approach, cover the eyes, tape the mouth first. Keep a transport box, tape, towel and heat packs as one kit beside the cage, and include calling the hospital ahead in the procedure.

A dwarf caiman (1.2 m) kept for four years is lying motionless on land with its mouth open and mucus coming from its nose. The keeper has found a hospital that handles Specified Animals and calls. The receptionist asks, "What kind of animal is it? Let me check whether we can take it." The flustered keeper is about to answer only, "It's a crocodile, please see it right away."

Which is the most appropriate thing to tell them on the phone?

1. Give the species, total length and weight, whether you hold a keeping permit, water and air temperature and diet, and the course of the symptoms, and confirm the transport method and whether they can accept it
2. Say only that it is a crocodile and give the details on arrival
3. To avoid being refused, say it is a large lizard
4. Describe only the symptoms and skip the permit and keeping conditions

AnswerA. Give the species, total length and weight, whether you hold a keeping permit, water and air temperature and diet, and the course of the symptoms, and confirm the transport method and whether they can accept it

ExplanationSeeing a Specified Animal requires preparation on the hospital's side (restraint tools, sedation, an isolation area), and information given in advance determines whether they accept it and the quality of treatment. Give the species, total length and weight, whether you have a keeping permit, water and air temperature, diet, and the course of the symptoms (when the mouth gaping started, amount of mucus, appetite); explain that transport will be in a dedicated box with several people, and confirm acceptance and which entrance to use on arrival. Leaving details until arrival means the hospital may be unable to cope and the trip is wasted. Pretending it is a lizard leaves the hospital's safety measures unprepared, leading to bite injuries and loss of trust. The permit and keeping conditions are needed for diagnosis (such as respiratory infection from cold) and legal confirmation, and should not be omitted. With mucus present, the target is a visit the same day.

IssuesThe information to give a hospital in an emergency had not been organized, and in the panic only the bare minimum could be conveyed. The keeper did not know that a Specified Animal visit needs advance confirmation and had not thought about having the permit ready.

ImprovementMake a card for each animal with species, total length, weight, permit number, regular vet, diet and temperatures, and keep it with a copy of the permit in the transport box. Post the items to report when seeking care next to the phone, and confirm in advance the acceptance conditions of hospitals that can treat the animal.

During event preparations at the facility, a visiting contractor climbed over the fence, went up to the cage door and was bitten on the finger through the mesh by a 9-year-old spectacled caiman (1.8 m); the finger is bleeding. The animal is agitated and keeps charging the mesh, with bleeding from its snout tip. Several visitors nearby are filming. The keeper and one colleague are present, with a first-aid kit and restraint tools.

Which is the most appropriate first action?

1. First approach the cage to check the animal's snout wound and attempt restraint
2. Ask the visitors to delete their videos before starting the response
3. Have everyone wait in place until the animal's agitation subsides
4. Move the visitors away, prioritize pressure on the bitten person's wound and calling 119 (ambulance), confirm the cage is locked and reduce stimulation to the animal, and check its wound from outside once it has calmed

AnswerD. Move the visitors away, prioritize pressure on the bitten person's wound and calling 119 (ambulance), confirm the cage is locked and reduce stimulation to the animal, and check its wound from outside once it has calmed

ExplanationWhen a human bite injury and an animal injury happen at the same time, human life and the prevention of further harm come first. First move the visitors away to prevent another bite; for the bitten person, press on the wound with clean gauze and call 119 (ambulance), so they can have fractures checked and receive antibiotics in the emergency room. For the animal, confirm the cage is locked and keep the surroundings quiet to reduce visual stimulation, which stops the charging. Check the snout wound from outside the cage once the animal has calmed, and see a vet if teeth or jawbone are exposed. Approaching an agitated animal to restrain it means a bite injury to the keeper. Asking for videos to be deleted comes later and must never take precedence over the injured person. Everyone waiting lets the bleeding and agitation continue. Record the incident as a facility and report to the prefectural government if required.

IssuesThe layout let a contractor climb the fence and reach the cage door, with fingers able to reach through the mesh. Supervision and access restriction were inadequate for a busy event-preparation period. The order of priority for simultaneous human and animal injuries had not been decided.

ImprovementInstall a double protective fence around the cage so no one can touch the mesh, and clearly define the areas open to contractors and visitors. Post the rule that every human bite means an emergency room visit, along with the criteria for calling 119. Assign emergency roles (casualty care, evacuation guidance, animal management) and drill once a year.