Common Marmoset case method: 50 questions

7 a.m. on a winter morning. A 4-year-old male kept as a pair is usually first to the feeding station, but today he is curled up alone on a branch below the nest box. He barely responds when the female comes over to groom him. He gives no high-pitched call when spoken to, and when you touch him his ears feel colder than usual. He has not touched his pellets.

Which is the most appropriate first action in this situation?

1. He might eat if the food is changed, so put out extra banana, his favorite, and wait
2. Keep him warm, dab a little sugar water on the corner of his mouth if he is conscious, and contact the vet right away
3. Assume it is a rank dispute, move the female to another cage and watch for a day
4. Dissolve a human multivitamin in water, give it to him and wait for him to perk up

AnswerB. Keep him warm, dab a little sugar water on the corner of his mouth if he is conscious, and contact the vet right away

ExplanationSitting alone away from the group, not calling, and a cold body are major danger signs in a marmoset. At only 300–500 g, they slip into hypothermia and low blood sugar quickly, so the rule is to warm them with a heat pack wrapped in a towel or cloth, dab a little sugar water on the corner of the mouth if conscious, and get to the vet immediately. Waiting with banana adds excess sugar, solves nothing and wastes time. Assuming a rank dispute and separating the cage mate adds further stress. A human vitamin is an overdose at this body weight and the act of dosing can itself cause aspiration. The urgency level is 'right now'.

IssuesThe questions are whether 24°C or above was maintained around the clock in winter, and whether a drop in appetite the previous evening was missed. Withdrawing from the group is an early sign, but the owner most likely could not tell it apart from normal rest.

ImprovementIn winter, place a thermometer at cage height and keep 24–28°C. At every morning feeding, record each animal's responsiveness, calls and appetite, and set up a system so that any abnormality is discussed the same day with a vet who sees primates.

An evening in the rainy season; a 2-year-old female in a group of three. Her stool has been loose for three days, and today she dropped stool mixed with mucus on the floor, and the fur around her anus is soiled. Her appetite is only slightly down and she can still climb the branches. She has lost 20 g since last week. The other two still have normal stool so far.

Which is the most appropriate response for the owner?

1. Bag the stool and photograph it, keep her warm, and see the vet the same day for a fecal exam
2. Crush a small amount of a human digestive remedy into her food and watch for a week
3. Give more fruit to hydrate her and wait for the stool to firm up
4. Decide it is not infectious because the cage mates are fine and just clean more thoroughly

AnswerA. Bag the stool and photograph it, keep her warm, and see the vet the same day for a fecal exam

ExplanationMarmosets are small and dehydrate fast; diarrhea lasting 2 days or more already warrants a same-day visit. Mucus stool and a soiled anal area are signs of intestinal parasites or protozoa, and also early signs of chronic enteritis (wasting syndrome), so a stool sample must be taken in for a fecal exam. A loss of 5% or more of body weight in a week is a warning sign, and 20 g already equals 4–6%. A human digestive remedy is wrongly dosed, does nothing against protozoa or worms, and delays the visit. More fruit worsens diarrhea with its sugar. Even if the cage mates show no symptoms, parasites spread through the group, so infection cannot be ruled out.

IssuesThe problems are the delay of three days after noticing soft stool, and failing to link the weight loss to a serious sign. Whether fecal exams were done twice a year and whether food was being given on the floor also need checking.

ImprovementCheck stool condition at every daily cleaning, and set a rule that loose stool for 2 days means a vet visit. Make weekly weighing a habit, and see the vet at a 5% loss. Continue fecal exams at intake and twice a year, and place feeding stations on the branches, not the floor.

Early afternoon in autumn. You saw an 18-month-old male fall from a mid-level branch onto the floor. Since the fall he drags himself along with his front legs and has no strength in the hind legs. He had occasionally limped before, and his back looked slightly rounded. His diet is mostly fruit and there is no UVB lamp.

Which is the most appropriate initial response in this situation?

1. Massage the hind legs to improve circulation and wait until he can move
2. Remove the branches, move him to a low cage to rest, and see the vet the same day for X-rays
3. Give extra calcium to strengthen the bones and check for improvement in a few days
4. Treat it as temporary shock from the fall and let him move freely in his usual cage

AnswerB. Remove the branches, move him to a low cage to rest, and see the vet the same day for X-rays

ExplanationLimping, a curved back and falling in an animal on a fruit-heavy diet with no UVB lamp is classic metabolic bone disease; the bones are brittle and a fall easily causes fractures or spinal injury. If the hind legs are not moving, he must rest in a low cage with the branches removed and be seen the same day for X-rays to check for fractures and spinal injury. Massage worsens a fracture site. Suddenly adding calcium does not heal a fracture, and without vitamin D3 it is not even absorbed. Returning him to a cage with high branches risks another fall and further injury. Inability to move or hind-limb paralysis after a fall meets the 'right now' criterion.

IssuesThere was a fundamental failure in nutrition management: a fruit-based diet and no UVB lamp. Despite earlier limping, no vet visit was made, and the animal was left to climb high branches with weakened bones.

ImprovementMake primate pellets with vitamin D3 the staple and keep fruit to a small side portion. Install a UVB lamp and replace it on schedule. See the vet immediately for limping or an inability to grip branches, and lay thick bedding under landing spots to reduce fracture risk.

A spring evening; an 8-year-old female. Her breath has smelled bad for a few weeks, and lately she drops crickets and pellets as soon as she puts them in her mouth, eating only soft fruit. The fur on her chest is damp with drool. There is no facial swelling yet. Gum was given in a dish rather than smeared on wood.

Which is the most appropriate response for the owner?

1. It is dirty teeth, so wrap gauze around a finger and scrub hard inside her mouth
2. She is eating soft food, so simply switch to a fruit-based diet and watch for a few months
3. Suspect periodontal disease or tooth wear, switch to soft food, and have an oral exam within a few days
4. Dilute a human mouthwash into her drinking water and continue until the odor is gone

AnswerC. Suspect periodontal disease or tooth wear, switch to soft food, and have an oral exam within a few days

ExplanationBad breath, drooling and avoiding hard food are classic signs of periodontal disease or tooth wear. In an older animal given gum in a dish rather than on wood, the lack of gnawing behavior has very likely allowed tooth wear or gum disease to progress. Left untreated, a tooth-root abscess will swell the face and she will stop eating. Scrubbing the mouth by force causes pain, struggling, bites and damaged teeth. Switching to fruit invites diabetes and obesity and solves nothing. Human mouthwash risks ingestion and poisoning. With no facial swelling yet, an oral exam within a few days is the target; with marked swelling or drooling, go the same day.

IssuesGiving gum in a dish deprived her of the natural gnawing behavior that maintains dental health. No annual oral exam was done, and the weeks of bad breath were left unaddressed.

ImprovementPack acacia gum into holes in branches so she has to gnaw it out every day. Include hard insects as side food. Schedule a yearly oral exam, and set a rule to see the vet within a few days for bad breath, drooling or dropped food.

A summer morning; a 10-year-old male. He was normal last night, but this morning his left cheek is clearly swollen and the eye is slightly closed. He shakes his head when trying to put food in his mouth and is drooling. When you try to touch him he shrieks and runs. His cage mate, a female, keeps trying to groom the swollen area.

Which is the most appropriate response at this point?

1. Open his mouth to look inside, and if there is pus, lance it with a needle
2. Do not touch the swelling, switch to soft food, do not force the mouth open, and see the vet the same day
3. Hold an ice pack directly on the swelling and wait a few days for it to go down
4. The female's grooming will heal it, so leave it to the group and watch

AnswerB. Do not touch the swelling, switch to soft food, do not force the mouth open, and see the vet the same day

ExplanationSudden facial swelling in an older animal is most often a tooth-root abscess; the rule is not to touch it, switch to soft food, and see the vet the same day. Forcing the mouth open causes severe pain and struggling, with a real risk of the owner being bitten. Lancing it yourself spreads infection and can damage facial nerves and blood vessels, so it is strictly forbidden. Direct contact with an ice pack can cause hypothermia or frostbite in such a small body, and waiting days lets the abscess spread until he cannot eat. The cage mate's grooming is not treatment and may make the wound worse. Swelling of the face or mouth and drooling meet the same-day criterion.

IssuesDespite the high risk of tooth wear and periodontal disease in a 10-year-old, there was no routine of oral exams or breath checks, and early warning signs were probably missed. The impulse to treat the swelling at home is also dangerous.

ImprovementOnce an animal is older, have an oral exam at least once a year and watch breath odor and eating at every feeding. Make facial swelling an automatic same-day visit, and confirm in advance the contact details of a vet who sees primates. Leave procedures to the vet.

An early-summer evening; a 6-year-old female. For the past six months she has been given plenty of fruit and honey because she loves them, and her weight has reached 520 g. Lately the water bottle empties almost twice as fast as before, and the urine stains on the pet sheets are larger. Her coat has lost its shine and her eyes look slightly cloudy. She has also become sluggish.

Which is the most appropriate response for the owner?

1. Suspect obesity and diabetes, and see the vet within a few days with a diet log and weight history
2. She drinks too much, so remove the water bottle and let her get fluids from fruit
3. Cut her food in half to slim her down quickly and watch
4. It is lack of exercise, so let her run for long periods in a large room to lose weight

AnswerA. Suspect obesity and diabetes, and see the vet within a few days with a diet log and weight history

ExplanationWeight gain, excessive drinking and urination, a dull coat and cataracts are classic signs of obesity and diabetes, commonly caused by feeding large amounts of fruit and honey. She needs a vet visit within a few days for blood sugar and urine tests, followed by a switch to a diet based on primate pellets, gum, insects and vegetables. Restricting water in a diabetic animal causes dehydration and acute deterioration and is extremely dangerous. Halving food abruptly drives a small animal into low blood sugar. Long free-roam sessions risk fractures and escape and do not treat diabetes. Cloudy eyes may be a complication, so an early visit is advisable.

IssuesSweet fruit and honey were given continually 'because she enjoys them', and nothing was done even when her weight exceeded the upper limit. The owner also lacked the knowledge to link a change in water intake to illness.

ImprovementKeep fruit and honey to a small side portion and make primate pellets and acacia gum the staple. Record weight once a week and check daily water intake using the marks on the bottle. Have a health check with blood tests every six months.

A winter afternoon. A 3-year-old male was kept as a pair, but the female died two months ago and he is now alone. Recently he has been biting the base of his tail persistently; the fur has come out and the skin is red. He paces back and forth over the same spot in the cage and sometimes screams all day. The wound is still shallow.

Which is the most appropriate response in this situation?

1. Bandage the tail so he cannot bite it, and spray him with water every time he screams to stop him
2. Treat it as stress-related self-injury: have the wound seen and, at the same time, urgently arrange to bring in a companion of the same species
3. He should get used to being alone, so leave the TV on so he hears human voices and leave him be
4. He must be lonely, so put a cat in the same room as a playmate

AnswerB. Treat it as stress-related self-injury: have the wound seen and, at the same time, urgently arrange to bring in a companion of the same species

ExplanationMarmosets are highly social animals that live in family groups of 3–15, and solitary housing is considered unacceptable. Biting the tail or arms, hair loss, stereotypic pacing and constant screaming after losing a companion are classic stress-related self-injury. The wound should be seen by a vet to prevent infection, and the root cause, isolation, must be resolved by bringing in a companion of the same species. Bandages and water-spray punishment increase anxiety and worsen the self-injury. TV sound is no substitute for a conspecific's calls and grooming. A cat is a predator and must never share the room; it can lead to a fatal accident. If the wound deepens, see the vet the same day.

IssuesThe owner failed to foresee that the death of one of the pair would leave the survivor alone, and let two months pass, which led to the self-injury. Environmental enrichment such as hides, high branches and foraging activities was probably also lacking.

ImprovementUntil a companion arrives, provide hides, high branches and daily foraging such as gum-packed branches. Introduce a new animal gradually. Prepare for the future death of a cage mate by keeping in touch with keepers or facilities that can advise.

An autumn morning; a 5-year-old female. Soft stool has continued for about a month, and a fecal exam found no parasites. She eats her pellets, yet her weight has dropped from 420 g to 350 g, and her coat is rough and dull. Her gums look pale, and today her hind legs move awkwardly. She has been unwell since the household moved six months ago.

Which is the most appropriate response for the owner?

1. No parasites means no worry, so give more nutritious honey and fruit to fatten her up
2. Assume it is moving stress and keep her away from the vet for a few more months until she settles
3. Suspect wasting syndrome, see the vet the same day with her weight history and stool photos, and review her diet and stress factors
4. Iron is good for anemia, so break up a human iron tablet and give it to her

AnswerC. Suspect wasting syndrome, see the vet the same day with her weight history and stool photos, and review her diet and stress factors

ExplanationThe combination of chronic diarrhea, weight loss, a rough coat, anemia and hind-limb weakness strongly suggests marmoset wasting syndrome. It is a chronic enteritis of unknown cause and cannot be ruled out by a negative parasite test. A weight loss of about 17% and pale gums are signs of a severe stage: see the vet the same day, reduce stress and shift the diet to primate pellets and gum. More fruit and honey worsens the enteritis. Even if stress is a factor, dehydration and anemia progress while you 'wait for her to settle'. A human iron tablet is wrongly dosed, risks poisoning, and should never be given without a diagnosis of the cause of the anemia.

IssuesA month of chronic diarrhea and major weight loss were left alone on the reassurance of a negative parasite test, and nothing was done about the stress of the move. Weekly weighing would have caught the problem early.

ImprovementKeep weekly weight and stool records, and see the vet at a 5% loss or 2 days of diarrhea. During a move or other change, keep the nest box, branches and companions the same and acclimatize gradually in a quiet place. Base the diet on primate pellets and gum.

A winter evening; a 7-year-old male. He normally exchanges high-pitched calls with his family, but for the past two days his voice has been hoarse and faint. He occasionally makes a dry cough-like sound and has lost a little weight. The owner has also had a cough since last week. The air-conditioner draft blows directly onto the cage.

Which is the most appropriate response?

1. The air-conditioner draft is the only cause, so move the cage and watch for a week
2. Coughing and weight loss could be a serious infection such as tuberculosis; keep him out of the draft and see the vet the same day
3. Let him lick plenty of honey to soothe the throat and wait for the voice to return
4. Break off a rice-grain-sized piece of a human cold tablet and see whether the cough stops

AnswerB. Coughing and weight loss could be a serious infection such as tuberculosis; keep him out of the draft and see the vet the same day

ExplanationCalling less than usual or a hoarse voice is an important sign of illness, and combined with coughing and weight loss it meets the 'go immediately' criterion for serious respiratory infections such as tuberculosis. Especially when the owner is also coughing, transmission from human to monkey is possible, so along with the same-day vet visit the owner should also consult a doctor. The direct draft should be avoided, but assuming it is the only cause and waiting a week is dangerous. Honey carries a diabetes risk and does nothing for respiratory signs. Human cold medicine causes severe poisoning at this body weight and is strictly forbidden.

IssuesThere was an environmental fault, the direct air-conditioner draft, and a hygiene problem: the owner kept caring for the animal while coughing. The change in calls was also not recognized early enough as a health sign leading to a vet visit.

ImprovementPlace the cage away from direct air-conditioner draft and windows. If the owner has a cough or fever, wear a mask, wash hands thoroughly, and if possible have another family member take over care. Keepers should have an annual health checkup, and a change in calls, coughing or weight loss should be an automatic immediate visit.

A spring morning; a 2-year-old female. Since yesterday evening she has been dropping pellets out of her mouth as soon as she takes them, and has actually eaten almost nothing. She shows no interest in insects. This morning she mostly sits still on a branch; her body is still warm. Her stool is small in amount but of normal firmness. Her male cage mate is eating well.

Which is the most appropriate response for the owner?

1. She has gone almost 24 hours without eating, so keep her warm and see the vet the same day for an oral and full examination
2. She is just being picky, so lay out several new kinds of fruit and wait for her to eat
3. The male eats fine so the food is not the problem; watch for 2–3 days and wait for natural recovery
4. Force her mouth open and push in softened pellets to make her eat

AnswerA. She has gone almost 24 hours without eating, so keep her warm and see the vet the same day for an oral and full examination

ExplanationMarmosets are small with a fast metabolism, and 24 hours without eating already warrants a same-day visit. Dropping food from the mouth signals mouth pain (periodontal disease, oral injury) or a decline in general condition, and seeing the vet now, while she is still warm, leaves more treatment options open. Tempting her with fruit ignores the root cause and adds excess sugar. A healthy cage mate does not rule out illness in this individual, and waiting 2–3 days risks progression to low blood sugar and hypothermia. Forcing the mouth open and pushing food in risks aspiration and bites, and if the mouth is painful it only causes suffering.

IssuesLoss of appetite was dismissed as pickiness, with insufficient awareness of how dangerous fasting is for a small animal. The problem was noticed the previous evening, yet the decision to see the vet was not made until the next morning.

ImprovementCheck how much each animal has eaten at every feeding; call the vet after half a day without eating and visit at 24 hours. Watch breath odor and how food is handled every day, and have an annual oral exam. Keep a warming box and heat packs on hand.

A weekend in early autumn; a family group of five. At the weekly weigh-in, a 3-year-old older sister has dropped from 400 g last week to 370 g. She looks normal, moves along the branches and comes to the feeding station, but you have seen the father and a younger brother chase her away several times. Her stool is normal, but there is a small bite mark at the base of her tail.

Which is the most appropriate response in this situation?

1. The loss is minor, so wait for next week's weigh-in and consider a vet visit if it drops further
2. It is the natural process of settling the group hierarchy, so do not intervene and leave it to the group
3. With a loss of over 7% and a bite wound, have her checked by the vet, split the feeding stations, and isolate her temporarily if needed
4. Move the father who chases her to a separate cage away from the group, and give the sister extra food

AnswerC. With a loss of over 7% and a bite wound, have her checked by the vet, split the feeding stations, and isolate her temporarily if needed

ExplanationA weight loss of 5% or more in a week is the threshold for a vet visit, and 370 g is a 7.5% drop. Being chased away by the group plus a bite mark suggests rank conflict causing underfeeding and stress, and possible bite-wound infection, so have her examined within a few days, and set up at least two feeding and water stations on the branches so every animal can eat. If the aggression continues, isolate her temporarily for safety. 'Waiting until next week' can be a fatal delay in a small animal. Leaving rank fights alone leads to deeper bites, and deaths have occurred. Removing the father collapses the group structure and provokes more fighting.

IssuesThe root cause was a single feeding station, in an environment where a low-ranking animal could not eat enough. The owner had seen her being chased away but had no criteria for intervening.

ImprovementProvide several feeding and water stations on the branches according to group size, plus several hides. Continue weekly weighing and see the vet at a 5% loss. If there are bite wounds or persistent chasing, separate the aggressor temporarily and consult a vet or an experienced keeper about restructuring the group.

1 a.m. in midwinter. The panel heater failed without anyone noticing, and the room temperature has dropped to 15°C. One of a pair, a 9-year-old female, is shivering in fine tremors inside the nest box; when picked up her hands and feet are cold and she responds sluggishly. The other animal is huddled against her but can still move. The nearby animal hospital is closed.

Which is the most appropriate first action?

1. Blow a hair dryer's hot air directly onto her body to raise her temperature quickly
2. Give her an unwrapped plastic bottle of hot water to hold and wait until morning
3. Warm her gradually with a heat pack wrapped in a towel, dab sugar water on the corner of her mouth if conscious, and call the emergency (after-hours) animal hospital
4. Keep her in the nest box with her companion so their body heat revives her, and just watch

AnswerC. Warm her gradually with a heat pack wrapped in a towel, dab sugar water on the corner of her mouth if conscious, and call the emergency (after-hours) animal hospital

ExplanationBelow 20°C is considered dangerous for marmosets, and shivering, cold extremities and sluggish responses at 15°C indicate dangerous hypothermia and low blood sugar; 'body cold' is an immediate-visit criterion. Warm her gradually with a heat pack wrapped in a towel or cloth, dab a little sugar water on the corner of the mouth if she is conscious, and call an emergency (after-hours) hospital that sees primates for transport instructions. Direct hot air from a dryer causes burns or shock through sudden rewarming. An unwrapped bottle causes low-temperature burns, and waiting until morning is dangerous. Body heat from a companion alone will not restore her at 15°C, and the second animal will become hypothermic too.

IssuesThere was no way to detect the heater failure, so the nighttime temperature drop was noticed late. No backup heating or temperature alarm had been prepared to maintain 24°C or above around the clock in midwinter.

ImprovementUse a max-min thermometer or smart thermometer that sends alerts at night. Keep a spare heater, disposable heat packs and a warming box on hand, and decide a warming procedure for power cuts or failures. Confirm in advance the contact details of an after-hours hospital that sees primates.

A Sunday afternoon. During free-roam time a 2-year-old male fell from the top of a bookshelf about 1.8 m high onto a hard floor. Since the fall he crouches without moving, holding his right front leg against his body. He calls when touched but does not run away. There is no visible bleeding. The owner, panicking, is about to pick him up.

Which is the most appropriate action in this situation?

1. Splint the leg with a chopstick and bandage, and wait until the clinic opens in the morning
2. Pick him up, set him on the floor to see whether he can walk, and decide he is fine if he can
3. Falls often cause fractures, so do not touch him, put him in a dark box to keep warm and quiet, and see the vet the same day
4. Give a small dose of a human painkiller and wait for the pain to ease

AnswerC. Falls often cause fractures, so do not touch him, put him in a dark box to keep warm and quiet, and see the vet the same day

ExplanationMarmosets have weak bones and fall fractures are common. Being unable to move after a fall of over 1 m is an immediate-visit criterion: do not touch or pick him up; place him in a dark box lined with a towel, keep him warm and quiet, and see the vet the same day. A splint is considered unnecessary on such a small body because it shifts the fracture and makes it worse. Setting him on the floor to test walking aggravates fractures and spinal injuries. Even a tiny dose of a human painkiller can cause fatal poisoning in a 300–500 g animal, and masking the pain delays diagnosis.

IssuesDuring free-roam time the animal was left unwatched where it could climb a 1.8 m shelf, with no cushioning beneath. The impulse to pick him up after the fall is also a classic error that worsens fractures.

ImprovementLimit the free-roam area and lay cushions or thick mats beneath furniture over 1 m high. Never look away, and cover climbable furniture in advance. Keep a dark warming box and towel ready, and make sure the whole family knows the rule for falls: do not touch, box, vet.

A summer evening, day two after adding a young female to an established pair's cage. Hearing frantic screaming from the cage, you find the newcomer's back has been bitten, her fur stained with blood, and the resident female is still chasing her. The newcomer trembles in a corner, with a small but steady trickle of blood from the wound.

Which is the most appropriate first action?

1. Grab the attacker bare-handed, pull her off, and scold her on the spot to teach her who is boss
2. Rinse the wound under running water, separate her from the attacker, and see the vet the same day if there is bleeding or swelling
3. Do not intervene until the group settles its hierarchy naturally; watch until the next morning
4. Pour plenty of disinfectant directly on the wound, put her back in the same cage and wait for them to make up

AnswerB. Rinse the wound under running water, separate her from the attacker, and see the vet the same day if there is bleeding or swelling

ExplanationBites from cage mates arise from rank conflict. First separate the victim from the attacker for safety, rinse the wound under running water, and see the vet the same day if there is bleeding or swelling. A marmoset's lower incisors are sharp enough to gouge bark, so wounds are often deeper than they look. Grabbing an agitated animal bare-handed gets the owner bitten too, and monkey bites always require medical attention because of the infection risk. Scolding does not resolve rank. Leaving her overnight lets blood loss and infection progress. Flooding the wound with disinfectant damages tissue, and returning her to the same cage invites another attack.

IssuesThe root cause was putting the new animal straight in without a gradual introduction. There were no multiple hides or feeding stations, so there was no escape from the fight.

ImprovementHouse a newcomer in a separate cage placed alongside so they get used to each other's scent and calls, then move step by step from short supervised meetings to cohabitation. Provide several hides and feeding stations and do not look away during the early introduction. Keep gauze and a spare isolation cage ready for bite wounds.

After morning feeding, the moment you closed the cage door a 4-year-old male shrieked. The tip of his tail was caught in the gap. When you hurriedly opened it, the last 3 cm or so of the tail hung bent at an unnatural angle. There is only a little oozing blood. He has returned to the branches but cannot move the tail tip.

Which is the most appropriate response for the owner?

1. Straighten the bent tail by hand and tape it in place
2. Press gauze gently on the bleeding, and because the tail hangs limp and cannot move, see the vet the same day
3. The tail tip will fall off and heal on its own, so leave it for a few weeks
4. Give plenty of banana to distract him from the pain

AnswerB. Press gauze gently on the bleeding, and because the tail hangs limp and cannot move, see the vet the same day

ExplanationThe tail is about 30 cm long and often gets caught when cage doors or room doors are opened and closed. A tail that is bent and cannot move after being caught suggests a fracture or dislocation; press gauze on any bleeding and see the vet the same day. Straightening it yourself worsens the fracture and the severe pain will get you bitten. Neglecting a tail-tip injury can lead to necrosis and infection requiring amputation. Banana is no diagnosis or treatment and adds excess sugar. The tail is a vital organ for balance, and early treatment directly affects recovery of function.

IssuesThe direct cause was the lack of a habit of checking the animal's position, especially the long tail, before closing the door. The cage door design also had a gap that could easily trap a tail and needs reviewing.

ImprovementAlways check every animal's position and tail by eye before closing the door. Fit rubber cushioning to the door gap to make trapping less likely. Secure room doors with door stoppers. Keep gauze and a warming box on hand, and make tail injuries an automatic same-day visit.

A winter night. The heat bulb mounted at the top of the cage had no guard. A 3-year-old female jumped up, touched the bulb, screamed and is shaking her hand. Her right palm is red and a small blister is forming. She favors the hand and grips the branch with one hand only.

Which is the most appropriate first action?

1. Apply a thick layer of human burn ointment, wrap it in gauze and watch
2. Pop the blister with a needle to drain the fluid and pour disinfectant on it
3. Press ice directly on the burn until the pain is gone
4. Cool it with a cold wet towel, do not touch the blister, apply no medication, and see the vet

AnswerD. Cool it with a cold wet towel, do not touch the blister, apply no medication, and see the vet

ExplanationFor burns from heat bulbs or heaters, the rule is to cool with a cold wet towel, leave the blister alone, apply no medication and see the vet. The palm is essential for a life spent gripping branches, and delayed healing impairs feeding and movement. Human ointment can be licked off and cause poisoning, and applying it before the vet's assessment hinders evaluation of the wound. Popping the blister opens a route for infection. Direct ice on such a small body causes frostbite and hypothermia. A same-day visit is the target; go immediately for extensive or deep burns.

IssuesThe cause was mounting the heat bulb without a guard in a spot reachable by jumping. The owner did not appreciate that marmosets are powerful jumpers that can reach even the top of the cage.

ImprovementAlways fit guards on heat bulbs and heaters and mount them outside the cage or where they cannot be reached even by jumping. If possible switch to a panel heater or whole-room temperature control. Share the burn first-aid procedure and the vet's contact details with the family.

Midday on a day off. A branch in the cage had come loose; a 1-year-old male jumped onto it, caught his left hind leg between two branches and fell. Below the ankle the foot points the wrong way, the skin is torn and part of the bone is visible. Blood is dripping. He is screaming in panic, and his older brother is agitated and racing around.

Which is the most appropriate first action?

1. Move the cage mate to another cage, then cover the wound with clean gauze and apply pressure, do not handle the leg, keep him warm in a dark box, and go to the vet immediately
2. Push the exposed bone back in, pull the skin together, tape it, and then head to the hospital
3. Flush the wound under tap water for a long time and wait at home until the bleeding stops completely
4. Hold and stroke him to calm him down, and book an appointment for tomorrow

AnswerA. Move the cage mate to another cage, then cover the wound with clean gauze and apply pressure, do not handle the leg, keep him warm in a dark box, and go to the vet immediately

ExplanationAn open fracture with exposed bone is an emergency for both infection and blood loss, and a secondary attack by the agitated cage mate must also be prevented. After moving the cage mate, cover the wound with clean gauze and press for 5+ minutes, do not handle the fracture, keep him warm and quiet in a dark box, and go to the vet immediately. Pushing the bone back drives infection deeper and damages nerves and vessels. Prolonged flushing moves the fracture, and putting it ahead of stopping the bleeding lets blood loss progress. Holding and stroking puts pressure on the fracture, and waiting until tomorrow raises the risk of infection and necrosis. Unable to move after a fall and heavy bleeding meet the 'right now' criterion.

IssuesThe direct cause was failing to inspect the loosened branch. There was no habit of checking fixings during the weekly branch washing, and the danger of a young animal with weak bones jumping around was overlooked.

ImprovementAt the weekly branch washing, always check for loose fixings and gaps, and secure branches firmly with cable ties or screws. Fill any gaps that could trap a foot. Strengthen bones with vitamin D3 pellets and a UVB lamp. Keep emergency gauze, a warming box and a spare cage on hand, and know which vet can see you immediately.

A winter evening. A 5-year-old female's claw caught in the fleece of the nest box, and as she struggled the middle finger of her left hand twisted. After she was freed, the finger is swollen and stays bent, not straightening, and she does not use it when gripping branches. There is no bleeding. Her claws have recently grown long and have been catching on fabric more often.

Which is the most appropriate response for the owner?

1. Cut the offending claws short on the spot with household nail clippers
2. Pull the finger back into its original position and see whether it moves
3. Suspect a dislocation or fracture in the swollen, immobile finger, rest her, see the vet the same day, and have the vet deal with the claws too
4. The finger is small and will heal by itself, so remove the fleece and watch for a few weeks

AnswerC. Suspect a dislocation or fracture in the swollen, immobile finger, rest her, see the vet the same day, and have the vet deal with the claws too

ExplanationA finger that is swollen, bent and immobile is most likely dislocated or fractured and needs a same-day visit with X-rays. A marmoset's fingers are essential for gripping branches, and if left alone the finger sets in a deformed position, impairing feeding and movement. The claws normally wear down on branches; if they overgrow and catch on fabric, the rule is to have the vet trim them. Household clippers can cut into the blood vessel, and she may struggle and bite. Pulling the finger back worsens a fracture or ligament injury. Even a tiny fracture does not heal correctly on its own, and weeks of neglect lead to loss of function.

IssuesThe warning sign of claws catching on fabric was there, yet having the vet trim them was put off. The cage may also have had too few branches for the claws to wear down naturally.

ImprovementHave the vet trim the claws promptly once they start catching. Add natural-wood branches of different thicknesses in the cage so the claws wear down naturally. Change the nest-box fabric to a tightly woven material that claws cannot snag, and check for wear and loose threads once a week.

A weekend afternoon. Hurrying to get a 6-year-old male back into his cage during free-roam time, the owner grabbed him bare-handed and was bitten hard on the index finger. Pulling the hand away made him bite deeper, and the finger is bleeding. The male is agitated and baring his teeth, and the owner is panicking.

Which is the most appropriate action at this moment?

1. Bear the pain, wrench the hand free by force and shake the monkey off onto the floor
2. Stay still and calm, cover his body and face with a thick towel to darken, and once he lets go return him to the cage in the towel
3. Hit the monkey on the head with the other hand to make him open his mouth
4. Walk to the sink with him still attached and run tap water over his face to make him let go

AnswerB. Stay still and calm, cover his body and face with a thick towel to darken, and once he lets go return him to the cage in the towel

ExplanationPulling your hand away when bitten deepens the wound, and hitting or shaking off a small marmoset causes fractures and destroys trust. The correct procedure is to stay still and calm, cover the body and face with a thick towel to darken, and once he lets go return him to the cage in the towel. Then rinse the wound under running water for 15+ minutes and disinfect. Monkey bites carry infection risk, so for a deep wound, swelling or fever see a doctor the same day and always say it was a monkey bite. Running water over him increases agitation and risks a fall or escape on the way.

IssuesGrabbing him bare-handed in a hurry was the direct cause of the bite. The owner did not know the basic rule of never handling marmosets bare-handed, nor what to do when bitten.

ImprovementTo return him to the cage, do not chase; lure him with food or gum, or use his companions' calls. Keep a thick towel within reach throughout free-roam time. Handle with gloves, and make sure the whole family knows the bite procedure: stay still, towel, 15 minutes under running water, tell the doctor.

9 p.m. You heard a 3-year-old female fall from the nest box at the top of the cage onto the floor. The area around her left eye is swollen and the skin above the eye is bleeding. She keeps the left eye closed and will not open it, and shakes her head. She can walk but leans to the right. The landing spot had only a thin pet sheet.

Which is the most appropriate response?

1. Press gauze lightly on the wound to stop the bleeding, suspect a head injury, rest her in a dark box, and go to the vet immediately
2. Force the eye open to check the eyeball and apply over-the-counter eye drops
3. She can walk, so judge it minor and put her back in the nest box to sleep until the clinic opens tomorrow
4. Hold an ice pack directly around the eye to cool the head and leave it overnight

AnswerA. Press gauze lightly on the wound to stop the bleeding, suspect a head injury, rest her in a dark box, and go to the vet immediately

ExplanationSwelling and bleeding around the eye plus leaning to one side after a fall on the head suggest head trauma or eyeball injury and require an immediate visit. Press gauze gently to stop the bleeding, keep her warm and quiet in a dark box, and transport her. Forcing the eye open worsens an eye injury, and human eye drops may contain unsuitable ingredients. Even if she can walk, head-injury signs can worsen with a delay, so waiting until tomorrow is dangerous. Direct contact with an ice pack causes hypothermia or frostbite, and leaving her overnight means changes go unnoticed. The thin pet sheet instead of thick cushioning bedding at the landing spot also contributed to the severity.

IssuesThere was no thick cushioning bedding at the landing spot, only a thin sheet, so the impact to the head was severe. The owner may also not have decided where to go for a nighttime fall.

ImprovementLay a thick layer of hardwood chips or sheets on the floor, with extra cushioning directly beneath the nest box. Rearrange the branches to reduce direct falls from height. Identify in advance an emergency hospital that sees primates at night, and keep a warming box and gauze on hand.

A weekday evening. Coming home, you find a 2-year-old male hanging upside down with his right ankle tangled in a frayed thread of the rope toy in the cage. How long he has been there is unknown. You quickly cut the thread and freed him, but the foot is swollen and purple, cold, and barely responds to touch. He does not move the foot at all.

After freeing the thread, which is the most appropriate response?

1. Rub the foot hard to warm it and restore blood flow, continuing until the color returns
2. Elevate and immobilize the foot until the swelling goes down, and watch until tomorrow
3. Suspect impaired blood flow and necrosis: do not touch, keep him warm and quiet, and go to the vet immediately, reporting how long he was tangled
4. The thread is off so the problem is solved; throw away the rope toy and carry on as usual

AnswerC. Suspect impaired blood flow and necrosis: do not touch, keep him warm and quiet, and go to the vet immediately, reporting how long he was tangled

ExplanationA purple, cold, numb foot after prolonged constriction means impaired blood flow and possibly the start of tissue necrosis: an emergency requiring an immediate visit. The estimated time tangled and the condition when found directly affect treatment, so tell the vet. Rubbing hard spreads toxins from necrotic tissue through the body and extends the damage. Elevating the foot and waiting until tomorrow lets necrosis progress, possibly to amputation. Removing the thread alone cannot assess the swelling and tissue damage after blood flow returns, so leaving it is dangerous. A frayed rope toy is an accident that pre-inspection could have prevented.

IssuesA frayed rope toy was left in place, and the danger of leaving the animal alone for long periods was not foreseen. The root problem was inadequate inspection when rotating toys.

ImprovementCheck ropes and hammocks daily for fraying and looseness and replace them as soon as a thread appears. Remove tangle-prone toys before long absences. Rotate moving toys and check their condition. On coming home, always check every animal's position and movement, and decide in advance where to go in an emergency.

A summer morning. A 4-year-old female was gnawing vigorously at a gum-smeared branch when she apparently cut the inside of her mouth on a splinter; she keeps drooling blood-tinged saliva. She rubs her mouth with her front paws and will not try to eat. The blood is pale red and small in amount, but it is still going after 10 minutes.

Which is the most appropriate response for the owner?

1. Pry the mouth open to find the wound and pack gauze inside the mouth
2. Do not force the mouth open; switch to soft food and watch the bleeding, and see the vet the same day if it continues for over 10 minutes or she does not eat
3. Give ice water to drink to cool the mouth and stop the bleeding, then leave her for a few hours
4. Pour an iodine disinfectant directly onto the wound

AnswerB. Do not force the mouth open; switch to soft food and watch the bleeding, and see the vet the same day if it continues for over 10 minutes or she does not eat

ExplanationForcing the mouth open with an oral injury makes her struggle and worsens the bleeding, and risks the owner being bitten. For minor bleeding, avoid exciting her, switch to soft food and observe; but if bleeding continues for over 10 minutes or she does not eat, a deep oral laceration or tooth damage is suspected, so see the vet the same day. Packing gauze into the mouth risks aspiration and choking. Ice water lowers a small animal's body temperature and can irritate the mouth and promote bleeding. Pouring disinfectant into the mouth leads to swallowing, poisoning and mucosal damage. Gum branches should have splinters removed beforehand.

IssuesThe gum branch was given without checking for splinters or sharp edges. The owner had no criteria for when continued bleeding warrants a vet visit, risking a delayed decision.

ImprovementSmooth the surface of gum branches and remove splinters and sharp points before giving them. Check for damage at the weekly branch washing. Make oral bleeding over 10 minutes or refusing food an automatic same-day visit, and keep soft food on hand.

While dinner was being prepared, a 1-year-old female on free-roam time darted across the floor to a family member's feet. Not noticing, they stepped on her; she screamed and collapsed on the floor. She got up right away but is breathing fast with her mouth open and objects to having her belly touched. There are no external injuries, and after a while she returned to the branches, but her breathing is still rapid.

Which is the most appropriate response in this situation?

1. No wounds and she got back to the branches, so judge her fine and feed her as usual
2. Rapid open-mouth breathing may mean internal injury or fractures; do not touch her, rest her in a dark box, and go to the vet immediately
3. Rub her belly to ease the pain and hold her until she calms down
4. Force her to drink water to settle her and watch until tomorrow morning

AnswerB. Rapid open-mouth breathing may mean internal injury or fractures; do not touch her, rest her in a dark box, and go to the vet immediately

ExplanationWhen a 300–500 g body is stepped on, rib fractures, lung injury or ruptured organs may occur even without external wounds. Open-mouth or rapid breathing is an immediate-visit criterion, and objecting to belly contact is a sign of internal injury. Do not touch her; keep her warm and quiet in a dark box and go to the vet at once. Returning to the branches does not rule out internal injury. Rubbing the belly or holding her worsens the damage and spreads internal bleeding. Forcing water causes aspiration, and waiting until morning risks death from respiratory distress or shock.

IssuesFree-roam time was allowed while attention was divided by cooking, with no precautions for an animal that darts across the floor. The basic rule of returning them to the cage during housework or visits was not followed.

ImprovementLimit free-roam time to when the whole family can pay attention, and always return them to the cage during housework, visits or cooking. Share the habit of checking the floor when walking, and use a toy with a bell so their position on the floor is known. Keep an emergency warming box on hand.

An early-summer afternoon. A window had been left slightly open for ventilation during free-roam time, and a 3-year-old male slipped out through the gap and climbed a tree in the neighbor's garden. He is calling anxiously from a branch about 4 m up. There are cats in the neighborhood and crows are cawing. His female cage mate is calling loudly from inside the cage.

Which is the most appropriate first action?

1. Climb the tree after him and reach out to grab him directly
2. Shout his name and throw stones to knock him off the branch
3. Put the female in a carrier beneath the tree so her calls draw him back, and lure him with food
4. He will come home on his own eventually, so wait in the house with the window open

AnswerC. Put the female in a carrier beneath the tree so her calls draw him back, and lure him with food

ExplanationMarmosets are small and fast and slip out through window gaps; outdoors they are in mortal danger from predators such as cats, crows and birds of prey, and from temperature changes. Calling him back with a companion's voice is the most effective method: bring the cage mate in a carrier and calmly recover him while luring with favorite food or gum. Chasing frightens him higher or farther away, and the owner risks a fall. Throwing stones causes fractures or a fatal fall in an animal with weak bones. He is unlikely to return on his own, and while you wait he may be taken by a predator or weaken in the nighttime cold. After recapture, check for injuries and body temperature, and see the vet the same day for any wounds or weakness.

IssuesAn open window during free-roam time was the direct cause, and the basic rule 'always close the windows' was taken lightly. There was no double protection against escape, such as cage and window locks.

ImprovementDuring free-roam time turn off fans and close and lock the windows themselves, not just the screens. Padlock the cage. Share the escape procedure (companion's calls, carrier, food) with the family, and let the neighbors know in advance that you keep marmosets. Always check health after a recapture.

A weekend morning. During free-roam time a child slammed the room door shut. A 2-year-old female's right hand was caught on the hinge side and she keeps screaming shrilly. The door was opened at once, but two fingers of the right hand are swollen and dark red, she lets the hand hang limp and will not try to climb the branches.

After opening the door, which is the most appropriate response?

1. Move each finger one by one to check for fractures yourself
2. Soak the hand in ice water until the swelling goes down and watch until tomorrow
3. Do not touch the hand; keep her warm and quiet in a dark box lined with a towel, and see the vet the same day for X-rays
4. Hug her until the screaming stops to calm her, then return her to her usual cage

AnswerC. Do not touch the hand; keep her warm and quiet in a dark box lined with a towel, and see the vet the same day for X-rays

ExplanationTails and fingers caught in doors and cage doors are common accidents in marmosets, and swollen fingers with an unusable hand suggest a fracture or dislocation. Do not touch; keep her warm and quiet in a dark box lined with a towel and see the vet the same day for X-rays. Moving the fingers to check worsens a fracture and the pain may get you bitten. Ice water causes hypothermia in such a small body, and waiting until tomorrow lets the swelling impair blood flow. Hugging compresses the injury, and returning her to the usual cage risks a fall from the branches and secondary injury. Fingers are essential for a life of gripping branches, and early treatment is key to recovering function.

IssuesThe doors were not secured during free-roam time, and the animal was left unwatched in a setting where a child could open and close doors. The basic measures, 'secure doors with stoppers' and 'check their position before closing', had not been shared with the family.

ImprovementSecure every door with a stopper during free-roam time and explain to children not to open or close them. Share the family rule of checking the animal's position before closing any door. Keep a warming box and towel on hand, and make trapping accidents an automatic same-day visit.

At night, during free-roam time, a 2-year-old male chewed a phone charging cable on the floor; with a small spark he gave a sharp squeak and fell on his side. The area around his mouth is slightly scorched, his body is somewhat rigid, and his breathing is shallow and fast. The cable is still plugged into the outlet. His female cage mate is trying to approach.

Which is the most appropriate first action?

1. Immediately pick him up bare-handed, pull him away from the cable and open his mouth to check
2. Put the female back in the cage first, and leave this animal lying on the floor until he recovers on his own
3. Splash water on him to bring him round and cool the scorched mouth
4. Unplug the cable first, then touch him, check breathing and responsiveness, keep him warm, and go to the vet immediately

AnswerD. Unplug the cable first, then touch him, check breathing and responsiveness, keep him warm, and go to the vet immediately

ExplanationIn an electric-shock accident, touching the animal while the current is live will shock the owner too, so the first step is to unplug and cut the power. Then check breathing and responsiveness, and start CPR if he is not breathing. The scorched mouth is an electrical burn, and pulmonary edema can develop with a delay, so an immediate visit is needed even if he seems to recover. Picking him up bare-handed and opening the mouth risks electric shock and bites. Leaving him on the floor worsens things through hypothermia and contact with the cage mate. Splashing water while the current is live spreads the shock and also lowers body temperature. The basic rule is to clear cords off the floor before free-roam time.

IssuesSmall items and cords on the floor were not cleared before free-roam time, and there were no precautions for the chewing habit. He was also left unwatched at night, when attention is lower.

ImprovementBefore free-roam time, cover or put away cords and fit covers on outlets. Never look away during free-roam time. Learn in advance the electric-shock procedure (cut power, check breathing, keep warm, go immediately) and how to perform CPR.

A winter night. The bathroom door was open, and a 3-year-old female on free-roam time fell into the bathtub, which still held leftover water. By the time the owner heard the splashing and pulled her out she was limp, had swallowed water, and spat water from her mouth. She is breathing, but weakly, and is soaking wet and shivering.

After pulling her out, which is the most appropriate action?

1. Blow a hair dryer on high to dry her quickly and put her straight back in the nest box
2. Tip her head down to drain water, then dry her with a towel, warm her with a heat pack wrapped in cloth, and go to the vet immediately while monitoring her breathing
3. She spat the water out so she is fine; dry her with a towel, return her to the cage and watch until morning
4. Hold her upside down and slap her back hard until every drop of water is out

AnswerB. Tip her head down to drain water, then dry her with a towel, warm her with a heat pack wrapped in cloth, and go to the vet immediately while monitoring her breathing

ExplanationAfter near-drowning, once water is drained from the airway, the top priority is warmth, because a wet body loses heat rapidly: towel off the water and warm her with a heat pack wrapped in cloth. If water was inhaled, pulmonary edema or aspiration pneumonia can develop hours later even when she looks recovered, so go to the vet immediately while monitoring breathing. A dryer on high causes burns and sudden temperature swings. 'She spat the water out so she is fine' is the classic error that misses delayed deterioration after near-drowning. Holding her upside down and slapping hard causes fractures or internal injury in an animal with weak bones. Weak or rapid breathing is an immediate-visit criterion.

IssuesThe bathroom door was open during free-roam time, and the danger of water left in the tub was not foreseen. There were no measures to limit the free-roam area and keep her out of wet areas.

ImprovementAlways close the bathroom, toilet and kitchen doors during free-roam time, and drain the bathtub. Limit the roaming area to one room and never look away. Share the near-drowning procedure (drain, warm, check breathing, go immediately) with the family and keep heat packs and towels on hand.

Moving day. While carrying two animals in a small carrier, you dropped it on the stairs. On opening it, the 1-year-old female is moving around, but the 4-year-old male lies on his side breathing with his mouth open, and his left hind leg is at an odd angle. You are in transit and there is no vet nearby.

Which is the most appropriate response in this situation?

1. Secure the carrier so it cannot shake, darken it and keep it warm, search for the nearest vet that sees primates and go there immediately
2. Plan to take him to a vet near the new home tomorrow and continue the journey as is
3. Put the leg back at its original angle before resuming the journey
4. The female is fine, so let her snuggle him and he will calm down and recover

AnswerA. Secure the carrier so it cannot shake, darken it and keep it warm, search for the nearest vet that sees primates and go there immediately

ExplanationInability to move after a fall, a deformed hind leg and open-mouth breathing are all immediate-visit criteria. Marmosets' weak bones fracture easily in falls, and open-mouth breathing suggests chest injury or shock. Secure the carrier so it does not shake, darken and warm it with a towel, and head immediately to the nearest vet that sees primates. Continuing the journey until tomorrow lets vibration worsen the injuries, with a risk of death from shock. Repositioning the leg worsens the fracture and causes severe pain. A companion's presence is reassuring but is not treatment, and abnormal breathing must not be left unattended.

IssuesBesides the drop itself, no vet that sees primates along the route had been identified in advance. Care in securing and carrying the carrier, especially on stairs, was also lacking.

ImprovementWhen moving, hold the carrier in both hands or secure it with a strap, and take special care on stairs. Identify primate-capable vets along the route and near the new home and note their contact details. Always line the carrier with a towel and bring heat packs wrapped in cloth.

A weekday midday, at home. Noticing it was unusually quiet, you looked at the cage and found a 6-year-old female hanging with a hammock suspension cord wrapped around her neck. You quickly cut the cord and brought her down; she is limp, breathing shallowly, and her tongue looks purple. There is a cord mark in the fur of her neck. She responds slightly.

Immediately after removing the cord, which is the most appropriate action?

1. Give her water to drink to sharpen her consciousness, and return her to the nest box once she settles
2. Gently massage the neck to restore blood flow and watch for a while
3. Her breathing has returned, so relax and book an appointment for tomorrow
4. Secure the airway and check breathing; if breathing stops, perform CPR while calling the vet, and go immediately

AnswerD. Secure the airway and check breathing; if breathing stops, perform CPR while calling the vet, and go immediately

ExplanationA purple tongue (cyanosis) after neck strangulation is a serious sign of oxygen deprivation. Once the cord is removed, secure the airway and check breathing; if she is not breathing, clear the mouth, squeeze the chest between thumb and index finger at 120 compressions per minute, and keep going while you call the vet and go immediately. After strangulation, throat swelling or pulmonary edema can develop with a delay, so a vet visit is essential even if breathing returns. Giving water to a semi-conscious animal causes aspiration. Massaging the neck worsens damage to the larynx or cervical spine. Waiting until tomorrow risks missing delayed respiratory failure.

IssuesThe hammock cord was of a length and design that could wrap around the neck, so toy safety inspection was inadequate. Even at home, it took time to notice that things were 'too quiet'.

ImprovementFix hammock and toy cords short and never leave loops. Inspect moving toys daily and use tangle-prone ones only briefly and in rotation. Review the CPR procedure and post the emergency number of a vet that sees primates where it is easy to see.

A summer afternoon. A fan was left running during free-roam time. A 2-year-old male jumped onto the fan and his tail was caught in the blades through a gap in the guard. He screamed and jumped off, but the middle of his tail is torn, blood is dripping and he drags the tail. Several drops hit the floor about every 10 seconds.

Which is the most appropriate first action?

1. Turn off the fan, press clean gauze on the wound for 5+ minutes, press lightly on the base side of the tail to control bleeding, and see the vet the same day
2. Rinse the tail under tap water for a long time to wash away the blood, dry it and watch
3. Wrap a rubber band tightly around the base of the tail as a tourniquet and head to the vet
4. Sprinkle plenty of over-the-counter styptic powder on the wound and watch until tomorrow

AnswerA. Turn off the fan, press clean gauze on the wound for 5+ minutes, press lightly on the base side of the tail to control bleeding, and see the vet the same day

ExplanationFor tail bleeding, the rule is to press clean gauze for 5+ minutes without lifting it, and for the tail or limbs press lightly on the heart side of the wound. A deep laceration with continued bleeding may need suturing, and a tail that hangs limp and cannot move suggests a fracture, so see the vet the same day. Heavy or unstoppable bleeding means go immediately. Prolonged rinsing prevents clotting and prolongs bleeding. A tight rubber band cuts off blood flow entirely and causes necrosis of the tail. Styptic powder is not enough for a deep wound, and waiting until tomorrow lets infection and blood loss progress. The rule is to turn fans off during free-roam time.

IssuesRunning a fan during free-roam time was the direct cause; the basic rule 'close windows and turn off fans' was not followed. The owner also underestimated the animal's jumping ability and its reach to the fan.

ImprovementDuring free-roam time, turn off fans or switch to a safe guarded model, and control room temperature with air conditioning. Keep gauze and a warming box on hand, and share the bleeding procedure (press for 5+ minutes, press lightly on the heart side) with the family. Make tail injuries an automatic same-day visit.

A Sunday afternoon. During free-roam time a 3-year-old female tore open a chocolate bar wrapper left on the table, and you caught her eating a piece (about 5 g). She has gone back to the branches looking fine for now, but there is chocolate around her mouth. She weighs 380 g. The owner remembers reading online that chocolate is dangerous for dogs.

Which is the most appropriate response for the owner?

1. Give her milk to dilute the chocolate in her stomach and watch
2. She is fine now, so nothing will happen; just be more careful next time
3. Give salt water to force her to vomit, and relax once she has
4. Note the type and amount eaten and the time, call the vet immediately, and follow their instructions to be seen

AnswerD. Note the type and amount eaten and the time, call the vet immediately, and follow their instructions to be seen

ExplanationChocolate is a food that must never be given to marmosets, and for a 380 g animal even 5 g is a large amount relative to body weight. Theobromine poisoning causes agitation, vomiting, seizures and arrhythmia within hours of ingestion, and treatment is difficult once symptoms appear. Note the type (cocoa content), the amount and the time, call the vet immediately and follow their instructions. Milk and other dairy products are also prohibited foods and do not dilute the toxin. 'She is fine now' is typical of the early stage of poisoning and is no reassurance. Forcing vomiting with salt water causes salt poisoning or aspiration in a small animal and is extremely dangerous.

IssuesFood on the table was not cleared before free-roam time, and knowledge that human snacks are harmful to marmosets was vague. The owner was also close to relying on the dangerous folk remedy of 'making her vomit'.

ImprovementClear all food and small items from tables and the floor before free-roam time. Make sure the whole family knows the prohibited foods (snacks, chocolate, dairy, avocado, raw meat, raw egg). Adopt the rule 'do not induce vomiting, call immediately' for poisoning, and post the number of a vet that sees primates on the refrigerator.

An autumn night. The fleece in the nest box had frayed and threads were hanging out. A 2-year-old male has had no appetite for two days and tonight is retching repeatedly without bringing anything up. His stools are small and few. You find a few centimeters of thread coming from the corner of his mouth; it resists when pulled. His abdomen is slightly distended.

Which is the most appropriate response in this situation?

1. Slowly pull the visible thread out by hand and consider it solved once it is all out
2. Do not pull the thread; cut off only the part outside the mouth, do not withhold food, keep him warm and go to the vet immediately
3. Give him oil to help the thread slide through and wait for it to pass with the stool
4. Give a small amount of a human stomach medicine for the nausea and see whether he eats tomorrow

AnswerB. Do not pull the thread; cut off only the part outside the mouth, do not withhold food, keep him warm and go to the vet immediately

ExplanationSwallowed threads or frayed fabric tangle in the intestine, and pulling cuts the gut wall and causes perforation. Never pull the visible thread; cut off only the part outside the mouth so no more is swallowed, and because vomiting, loss of appetite and abdominal distension are signs of intestinal obstruction, go to the vet immediately. Small animals develop low blood sugar when fasted, so do not withhold food without a vet's instruction. Oil does not relieve an obstruction and risks aspiration. Human stomach medicine is wrongly dosed and masks symptoms, missing the window for surgery. Marmosets mouth bedding, fabric threads and toy fragments, so vomiting or loss of appetite always calls for a vet visit.

IssuesThe frayed fleece in the nest box was left in place; deterioration was missed at the weekly washing and inspection. There was also a delay in not seeking care at the stage of two days without appetite.

ImprovementWhen washing nest-box fabric weekly, always check for fraying and loose threads and replace damaged items at once. Remove thread scraps and small toy fragments from the bedding daily. Set the rule: 24 hours without eating means a vet visit; vomiting means go immediately.

A spring morning. You found a 4-year-old female on free-roam time climbing a pothos plant in the living room and chewing several leaves. A few minutes later she began rubbing her mouth repeatedly and drooling with foam. She shakes her head and cannot call, her mouth hanging open. She can still walk.

Which is the most appropriate response for the owner?

1. Remove whatever plant fragments you can from her mouth, note the plant's name, call the vet immediately and go in
2. Spray water forcefully into her mouth to rinse it out
3. The foam is proof the poison is being expelled, so leave her until it stops
4. Give milk to neutralize the poison and watch until tomorrow

AnswerA. Remove whatever plant fragments you can from her mouth, note the plant's name, call the vet immediately and go in

ExplanationPothos and many other houseplants contain calcium oxalate and similar compounds; chewing them causes intense mouth pain, drooling, foaming and swelling. Remove any plant fragments you can from the mouth, note the plant's name or take a photo, call the vet immediately and go in. Swelling of the mouth or throat can progress to breathing difficulty, so an animal that cannot call with its mouth hanging open needs to be seen the same day. Spraying water forcefully causes aspiration and hypothermia and makes her struggle more from fear. The foam is a sign of mucosal inflammation, not detoxification, and leaving it is dangerous. Milk is a prohibited dairy food, has no neutralizing effect, and waiting until tomorrow lets the swelling worsen.

IssuesThere was a houseplant within the free-roam area, and the owner did not foresee that a tree-dwelling marmoset would climb the pot and chew it. There was no knowledge of plant toxicity, and the room safety check was inadequate.

ImprovementRemove all houseplants from the free-roam room or move them to a separate room that is definitely out of reach. Check a list of toxic plants and research safety before bringing in any new plant. Share the family rule for poisoning: note the plant's name and call immediately.

A winter morning. An elderly family member dropped a blood-pressure pill they had forgotten to take, and a 5-year-old male on free-roam time picked it up and put it in his mouth. You tried to get it out at once, but he seems to have swallowed it. He is fine for now; the drug name is on the blister pack, and he weighs 450 g. Your regular vet opens in an hour.

Which is the most appropriate response?

1. He is fine, so wait for opening time and go in during normal hours
2. Put a finger down his throat to make him vomit, and consider it fine if he does
3. Take the blister pack and call an emergency (after-hours) animal hospital or an animal poison hotline immediately, then follow their instructions to be seen
4. Give him lots of water to dilute the drug and flush it out in the urine

AnswerC. Take the blister pack and call an emergency (after-hours) animal hospital or an animal poison hotline immediately, then follow their instructions to be seen

ExplanationFor a 450 g marmoset, even one human tablet can be a lethal dose. Blood-pressure drugs cause low blood pressure, slow heart rate and fainting, with a delay before symptoms appear. 'He is fine now' is typical of early poisoning, and waiting an hour for opening time may miss the window for treatment. Take the blister pack (drug name and strength), call an emergency (after-hours) animal hospital or an animal poison hotline immediately, and follow their instructions. Putting a finger down the throat risks bites and aspiration, and inducing vomiting is itself dangerous in small animals. Lots of water does not stop absorption and raises the risk of aspiration.

IssuesFree-roam time was allowed in a setting where an elderly family member might drop medication, and the floor check for small items was inadequate. The owner also underestimated how dangerous swallowing medication is for a small animal.

ImprovementCheck the floor by eye before free-roam time and always keep medication in lidded containers or drawers. Decide where family medication is kept and take it in a separate room. Note the numbers of an after-hours hospital and an animal poison hotline, and share the rule: do not induce vomiting, call immediately.

An early-summer morning. Yesterday, thinking 'natural food is best', you gave grasshoppers and caterpillars caught in the garden to your three animals. This morning a 1-year-old male is vomiting, trembling in fine tremors and cannot come down from the branch. The other two have lost their appetite too. Last week the neighbors sprayed herbicide in their garden. Stools are slightly soft.

Which is the most appropriate response for the owner?

1. Wild insects are safe, so decide the trembling is cold and turn up the heater
2. Suspect poisoning or infection from herbicide or parasites, keep all three warm and go to the vet immediately, reporting the insects given and the garden situation
3. Take only the badly affected male to the vet, and watch the other two since they are fine
4. Give extra fruit and water to dilute the poison and wait for the stools to firm up

AnswerB. Suspect poisoning or infection from herbicide or parasites, keep all three warm and go to the vet immediately, reporting the insects given and the garden situation

ExplanationInsects caught outdoors may carry pesticide or herbicide residue and transmit parasites and protozoa, and must not be given to marmosets. Vomiting, trembling and inability to move are dangerous signs of poisoning that can progress to seizures. All three ate the same insects and were exposed, so keep every animal warm, including those with mild signs, go to the vet immediately, and report the insect types and the herbicide. Assuming the trembling is cold misses the progression of poisoning. Taking only the worst-affected animal means it is too late when the others deteriorate later. Extra fruit worsens the diarrhea and does not dilute any toxin.

IssuesThe belief that 'natural food is best' showed a failure to understand the dangers of wild insects (pesticides, parasites). Although the owner knew about the neighbors' herbicide, the connection was not considered.

ImprovementAlways feed safe commercial feeder insects such as farmed crickets. Share with the family that wild insects, raw meat and raw egg are prohibited foods. When introducing a new food, try a small amount on one animal at a time, and set the policy that any abnormality means all animals go to the vet.

2 p.m. in August. Lightning caused a power cut and the air conditioning stopped. An hour later the thermometer by the cage reads 32°C. All three animals lie stretched out on the branches, breathing fast with their mouths open. One is limp and cannot get to the water. When power will return is unknown.

Which is the most appropriate first action?

1. Immerse their bodies in ice water to cool them rapidly and bring the temperature down at once
2. With no fan, open the windows wide to let air through and just wait
3. Put ice packs wrapped in cloth in the cage, shade the windows and ventilate to lower the room temperature, cool the limp animal with a wet towel, and call the vet
4. Getting used to heat matters too, so just top up the water and wait for power to return

AnswerD. Getting used to heat matters too, so just top up the water and wait for power to return

ExplanationThe marmoset's comfort range is 24–28°C; at 32°C, rapid open-mouth breathing and lethargy are dangerous signs of heatstroke and meet the immediate-visit criterion. Place ice packs or frozen water bottles wrapped in cloth near the branches in the cage, shade from direct sun and ventilate to lower the room temperature, cool the limp animal with a wet towel while calling the vet, and move them somewhere cool if possible. Immersion in ice water causes shock through a sudden drop in body temperature. Opening windows alone is not enough when the outside air is hot, and risks escape. 'Getting them used to it' is wrong: in a small body heatstroke becomes fatal within a short time.

IssuesNo heat measures for a power cut (ice packs, frozen bottles, a place to evacuate to) had been prepared, and the response was delayed until the temperature had reached 32°C in an hour. There was no preparation for a summer power cut.

ImprovementIn summer keep ice packs and frozen water bottles in the freezer, and in a power cut wrap them in cloth and put them in the cage at once. Decide in advance on a cool place to evacuate to (relatives, the car, a facility). Place a thermometer at cage height and set 28°C as the trigger to act.

10 p.m. in January. Heavy snow has caused a power cut, stopping the panel heater and air conditioning. The room temperature has fallen from 22°C to 19°C in an hour and will keep dropping. The pair huddle together in the nest box, but one has begun to shiver. Power is not expected back before morning. You have disposable heat packs and blankets in the house.

Which is the most appropriate response?

1. Put unwrapped disposable heat packs inside the nest box in direct contact with their bodies
2. Warm the nest box with heat packs wrapped in cloth, cover the whole cage with a blanket to hold the warmth, keep the two together, and check the temperature regularly
3. Put the two animals in separate boxes and sleep with them in your own bedding
4. Light the gas stove to heat the room and go to bed with it on

AnswerB. Warm the nest box with heat packs wrapped in cloth, cover the whole cage with a blanket to hold the warmth, keep the two together, and check the temperature regularly

ExplanationBelow 20°C is dangerous for marmosets, and shivering at 19°C is the onset of hypothermia. Wrap disposable heat packs in cloth and place them around the nest box and on the floor, cover the whole cage with a blanket to keep the warmth in, keep the two together so they warm each other, and check with a thermometer regularly. Unwrapped heat packs cause low-temperature burns and consume oxygen, making them dangerous inside a closed nest box. Separating the pair is worse for both stress and heat retention, and in bedding there is a risk of crushing. Running a gas stove for a long time risks carbon monoxide poisoning and fire, especially while asleep. If the shivering does not stop and the body goes cold, go to the vet immediately.

IssuesPreparations for a winter power cut (enough heat packs, blankets, a backup power source) were inadequate and there was no procedure. The system for keeping 24°C or above around the clock depended entirely on electricity.

ImprovementIn winter, stock plenty of disposable heat packs and have a blanket to cover the cage and a thermometer ready. Secure non-electric heat sources such as a portable power station or hot-water bottles. Share the power-cut procedure (cloth-wrapped heat packs, blanket cover, regular temperature checks) with the family and decide on an evacuation destination.

A strong earthquake (intensity 6-lower on the Japanese scale) strikes in the middle of the night. The 150 cm cage has toppled and the three animals inside are screaming. Items from the shelves are scattered and glass is broken. The family is preparing to go to the evacuation shelter, which may not allow pets. One animal seems to have difficulty moving.

Which is the most appropriate first action?

1. Open the cage, catch all three bare-handed, put them in pockets or inside your clothes and head to the shelter
2. Leave the three in the cage, evacuate the people only, and come back once things settle
3. Leave the toppled cage as it is and watch in the house until morning
4. Once your own safety is secured, right the cage and check every animal for injuries, put towels and heat packs in a carrier, and contact a primate-capable vet so the animal that cannot move well can be seen immediately

AnswerD. Once your own safety is secured, right the cage and check every animal for injuries, put towels and heat packs in a carrier, and contact a primate-capable vet so the animal that cannot move well can be seen immediately

ExplanationIn a disaster, first secure your own and your family's safety, then right the cage and check every animal for injuries. Marmosets' weak bones fracture easily and spinal injuries are common when a cage topples, so an animal that has difficulty moving needs an immediate visit: contact a vet that sees primates. For evacuation, put them in a carrier together with their companions and keep them warm with a towel and heat packs wrapped in cloth. Catching them bare-handed gets you bitten by panicked animals, and pockets risk crushing and escape. Leaving them in the cage risks their lives through further toppling in aftershocks, escape and hypothermia. Leaving the cage toppled lets injuries and hypothermia worsen.

IssuesThe tall cage was not anchored against toppling, and there was no earthquake evacuation plan (carrier, warmth, a place to board them, a pet-friendly shelter). The disaster contact details of a vet that sees primates had not been confirmed either.

ImprovementAnchor the cage to the wall and keep nothing above it that could fall. Pack a carrier that fits every animal, towels, heat packs, pellets, water and gum into an emergency go-bag. Confirm in advance pet-friendly shelters, boarding options and the contact details of a primate-capable vet.

Late June. After days of rain the indoor hygrometer reads 85%. Black mold has grown in a corner of the wooden nest box, and the bedding is damp and smelly. Two of the three animals have soft stool, and one has a damp-looking coat and keeps scratching. The air conditioner is used only for cooling, never for dehumidifying.

Which is the most appropriate response?

1. Wipe the moldy nest box with bleach, put it straight back in the cage and watch
2. Humidity is natural, so take no action and wait for the diarrhea to clear
3. Replace the nest box and bedding, wash and dry them, dehumidify to bring humidity down to 50–70%, and take the animals with soft stool to the vet within a few days with stool samples
4. Spray a disinfectant spray directly onto the animals in the cage to fight the mold

AnswerC. Replace the nest box and bedding, wash and dry them, dehumidify to bring humidity down to 50–70%, and take the animals with soft stool to the vet within a few days with stool samples

ExplanationThe right humidity for marmosets is 50–70%; at 85%, mold and bacteria multiply and cause diarrhea and skin problems. Replace the moldy nest box and damp bedding, wash and dry them thoroughly, and dehumidify to bring humidity into the proper range. Take the animals with soft stool to the vet within a few days with stool samples, or the same day if it lasts 2 days or more. A nest box merely wiped with bleach leaves residue that is licked and causes poisoning, and the mold roots remain. Leaving high humidity leads to respiratory and skin disease. Spraying disinfectant directly on the animals causes poisoning and skin damage and is strictly forbidden.

IssuesThe owner did not know the humidity standard and did not act despite watching the hygrometer. Weekly washing and replacement of the wooden nest box and bedding was not enough in the rainy season, allowing mold to grow.

ImprovementPlace a hygrometer near the cage and use a dehumidifier or the air conditioner's dry mode above 70%. In the rainy season, replace the nest box and bedding more often and keep a spare nest box so they can alternate while drying. Record any soft stool and see the vet if it continues for 2 days.

Midday in July, three days after the cage was moved to a window during a room rearrangement. Coming home in the afternoon, you find the western sun shining directly onto the cage and the nest box on the top level hot to the touch. The pair lie limp on the floor at the bottom, breathing with their mouths open. The air conditioner was running, set to 26°C.

Which is the most appropriate first action?

1. The air conditioner is running so there is no problem; close the door and go back out
2. Move the cage out of direct sunlight, put ice packs wrapped in cloth in it, and go to the vet immediately if the open-mouth breathing continues
3. Give the pair a cold shower to cool them at once and make them drink water
4. Shut them in the nest box to rest and watch until evening

AnswerB. Move the cage out of direct sunlight, put ice packs wrapped in cloth in it, and go to the vet immediately if the open-mouth breathing continues

ExplanationEven with the air conditioner running, direct sunlight through a window heats the cage locally, and the top-level nest box in particular traps heat. Open-mouth breathing and lethargy are signs of heatstroke and meet the immediate-visit criterion. Move the cage out of direct sun, cool it with ice packs wrapped in cloth, and go to the vet immediately if the signs continue. 'The air conditioner is on so it is fine' is the classic error that misses local overheating. A cold shower causes shock through a sudden drop in body temperature. Shutting them in the hot nest box makes it worse. A marmoset cage belongs away from direct sunlight, windows and air-conditioner draft.

IssuesThe cage was put by a window during the rearrangement without considering direct sunlight and the western sun. The temperature at the top of the cage was not checked, and the air conditioner setting alone was taken as reassurance.

ImprovementPlace the cage away from windows, direct sunlight and air-conditioner draft. Put thermometers at both the top and bottom of the cage and act above 28°C. In summer, have blackout curtains and ice packs ready, and make it a habit on coming home to check every animal's breathing and behavior first.

A winter weekend. You saw a family member with an active cold sore, out of affection, feeding fruit mouth-to-mouth to a 3-year-old female and letting her lick their face. The marmoset seems fine so far. The owner vaguely remembers hearing that human herpes is dangerous to monkeys but is not sure.

Which is the most appropriate response for the owner?

1. Stop the contact at once, bar that family member from care, report the exposure to the vet for advice, and watch appetite, energy and the mouth closely for several days
2. Explain that monkeys are hardy and human herpes does not spread to them, and allow mouth-to-mouth feeding to continue
3. Crush a human antiherpes tablet and give it to her just in case
4. Wipe her mouth with alcohol to disinfect the virus and carry on as normal

AnswerA. Stop the contact at once, bar that family member from care, report the exposure to the vet for advice, and watch appetite, energy and the mouth closely for several days

ExplanationHuman cold sores (herpes simplex virus) are fatal to marmosets, and mouth-to-mouth feeding and kissing are strictly forbidden. If exposure is suspected, stop the contact immediately, bar the family member with the cold sore from care, and report the exposure to the vet for advice. Allowing for the incubation period, watch closely for several days to two weeks for changes in appetite and energy, blisters in the mouth or on the lips, and neurological signs, and go to the vet immediately if anything appears. 'It does not spread' is wrong and dangerous. Self-administering a human antiviral is wrongly dosed and must never be done without a vet's judgment. Wiping the mouth with alcohol cannot remove a virus already transmitted and damages the mucosa.

IssuesThe whole family had not shared the marmoset-specific danger of 'no mouth-to-mouth, no kissing'. That a person with an active cold sore was able to keep providing care was also a management failure.

ImprovementSet a family rule that anyone with a cold sore, a cold or a cough does not provide care, and put in writing that mouth-to-mouth feeding and kissing are absolutely prohibited. Wash hands with soap before and after care and wear a mask. Keep the contact details of a primate-capable vet to consult in case of exposure.

Three days ago, while cleaning the cage, you were bitten on the finger by a 4-year-old male. You only washed it lightly at the time and left it. Today the area around the wound is red, swollen and hot, and the lymph nodes under your arm are tender. You have a slight fever. You feel it is 'not bad enough to see a doctor'.

Which is the most appropriate response for the owner themselves?

1. Apply an over-the-counter antibiotic ointment, put on a bandage and watch for a few more days
2. See a doctor immediately, tell them it was a monkey bite, and have the wound and fever examined
3. Cut open the wound to let the pus out, wash with disinfectant and watch
4. Marmosets do not carry B virus, so it is fine to leave it

AnswerB. See a doctor immediately, tell them it was a monkey bite, and have the wound and fever examined

ExplanationA monkey bite must always be reported to a doctor and examined. Swelling, heat, tender lymph nodes and fever after a bite show a progressing bacterial infection that can lead to cellulitis or sepsis if left. A marmoset's mouth harbors bacteria that infect humans, such as Salmonella, and although B virus is mainly a macaque problem, all monkey bites are treated as a special case by medical services. Over-the-counter ointment does not treat deep infection, and cutting the wound yourself spreads it. The self-judgment 'it is a marmoset so it is safe' is dangerous; the right response was 15+ minutes under running water and a doctor's visit straight after the bite.

IssuesThe owner did not rinse under running water for 15+ minutes or see a doctor right after the bite, washing lightly and leaving it. There was insufficient awareness that monkey bites require special medical attention, and the owner's own symptoms were taken too lightly.

ImprovementIf bitten, rinse under running water for 15+ minutes at once and disinfect; for a deep wound, swelling or fever see a doctor the same day and always say it was a monkey bite. Wear thick gloves when cleaning and never approach an agitated animal bare-handed. Keepers should have an annual health checkup.

Autumn. A young male received from an acquaintance was put straight into the cage with the existing three without quarantine. A week later the newcomer passed mucus stool, and then the three residents developed soft stool one after another. The feeding station is shared, the cage is cleaned every three days, and food dishes are washed in the kitchen sink.

Which is the most appropriate response for the owner?

1. Collect stool from every animal and take them to the vet for fecal exams, isolate the newcomer in a separate cage, wash dishes somewhere other than the kitchen, and clean daily
2. It is stress diarrhea from the change in the group, so wait two weeks for them to settle
3. Give all of them an over-the-counter dog and cat dewormer and watch
4. Take only the newcomer, who is worst affected, to the vet and watch the three residents since they are fine

AnswerA. Collect stool from every animal and take them to the vet for fecal exams, isolate the newcomer in a separate cage, wash dishes somewhere other than the kitchen, and clean daily

ExplanationA new animal needs quarantine including a fecal exam at intake; skipping this most likely allowed intestinal parasites or protozoa to spread through the group. Collect stool from every animal and take them to the vet for fecal exams to identify the cause. Isolate the newcomer in a separate cage, wash dishes somewhere other than the kitchen, and clean the cage daily to prevent reinfection. Bacteria such as Salmonella also infect humans, so washing equipment in the kitchen raises the risk to people. Assuming stress and waiting two weeks lets dehydration and weight loss progress. Dog and cat dewormers are wrong in dose and target and are dangerous. The residents were exposed too, so every animal needs testing.

IssuesThe root cause was the faulty introduction: housing the new animal immediately without quarantine or a fecal exam. Cleaning only every three days and washing equipment in the kitchen were hygiene failures that increased both the spread and the risk to humans.

ImprovementQuarantine a new animal in a separate room and cage for at least 2–4 weeks, confirm a negative fecal exam, then introduce gradually. Remove droppings from the cage daily and wash dishes in a dedicated sink or washing area. Wash hands with soap after care and run fecal exams on every animal twice a year.

Winter. The owner has had a cough and slight fever for over a month but has been too busy with work to see a doctor. Around the same time a 5-year-old female began coughing too, and although she eats she is losing weight and listless. The owner leans close to the cage every day while caring for her and wears no mask.

Which is the most appropriate response?

1. The monkey's cough is due to dry air, so set up a humidifier and watch
2. Give the monkey a nutritional supplement, and have the owner see a doctor once work calms down
3. The owner sees a doctor immediately for tests including tuberculosis and strictly wears a mask and washes hands; the monkey also goes to the vet immediately for coughing and weight loss, with the possibility of tuberculosis reported
4. Board the monkey with another family to cut contact, and let the owner wait to recover naturally

AnswerC. The owner sees a doctor immediately for tests including tuberculosis and strictly wears a mask and washes hands; the monkey also goes to the vet immediately for coughing and weight loss, with the possibility of tuberculosis reported

ExplanationTuberculosis is a zoonosis transmitted both ways between humans and monkeys through coughing, droplets and close contact, and coughing with weight loss in a marmoset meets the immediate-visit criterion. A cough and slight fever lasting over a month in the owner are also symptoms that should raise suspicion of tuberculosis: see a doctor immediately for testing and wear a mask and wash hands strictly until it is settled. The monkey should also be seen immediately, with the owner's symptoms and the possibility of tuberculosis reported to the vet. Assuming dry air lets infection progress in both. A supplement does not treat infection, and the owner's delay makes them a source of infection for family and animals. Boarding the monkey elsewhere while the source is unknown risks spreading the infection.

IssuesThe owner ignored a lingering cough and kept providing care close to the cage without a mask, raising the infection risk for both human and animal. The keeper's annual health checkup had also not been done.

ImprovementKeepers should have an annual health checkup, wear a mask when they have a cough or fever, and if possible hand care over to another family member. Any cough lasting over two weeks must be seen by a doctor. Make coughing or weight loss in a marmoset an automatic immediate visit, and share knowledge of zoonoses with the family.

6 a.m. on a winter morning. Looking into the nest box, you find a 3-year-old male limp and unresponsive. He does not move when called, but his body is still slightly warm. You cannot see his chest moving and his mouth is half open. His female cage mate is touching him and calling. The emergency (after-hours) hospital is 30 minutes away by car; your regular vet opens at 9.

Which is the most appropriate first action?

1. Clear the mouth, squeeze the chest between thumb and index finger at 120 compressions per minute, blow a small breath into the nose after every 5, and call the emergency hospital while doing so
2. He is probably dead, so wait for your regular vet to open and have the cause of death confirmed
3. Shake him hard and shout his name, continuing until he responds
4. Splash cold water on his face to revive him, and return him to the cage if he responds

AnswerA. Clear the mouth, squeeze the chest between thumb and index finger at 120 compressions per minute, blow a small breath into the nose after every 5, and call the emergency hospital while doing so

ExplanationWhen an animal is unresponsive with no visible chest movement but the body is still warm, starting CPR immediately gives a chance of recovery. The procedure is to clear any foreign matter from the mouth, squeeze the chest between thumb and index finger at 120 compressions per minute, and blow a small breath into the nose after every 5 compressions. Keep going while you call the emergency hospital, follow their instructions and transport him. Marmosets are small, with a normal heart rate around 200 and 30–50 breaths per minute, and a delay of minutes in resuscitation is life-threatening. Waiting three hours for opening time is fatal. Shaking hard causes fractures and spinal injury and wastes resuscitation time. Cold water worsens hypothermia and hinders the return of a heartbeat.

IssuesChanges the previous evening (appetite, calls, withdrawing from the group) may have been missed. The CPR procedure and the emergency hospital's contact details had not been checked in advance, causing hesitation when it mattered.

ImprovementPrint the CPR procedure (clear the mouth, 120 chest compressions per minute, a breath into the nose every 5) and post it near the cage. Confirm the emergency hospital's number and route. Check every animal before bed each night, and act on any change rather than waiting until morning.

A summer evening. A 6-year-old female suddenly went rigid, thrashed her limbs and fell from a branch. The seizure continued on the floor, with foam at her mouth. It stopped after about a minute, but she is dazed, cannot stand, and her body is hot. Her male cage mate is agitated and racing around her. She had not eaten much today.

Immediately after the seizure stops, which is the most appropriate action?

1. Put a finger in her mouth to pull out the tongue and stuff cloth in so she cannot bite it
2. Hold her and keep calling her name until she comes round, then return her to the usual cage once she settles
3. Pour sugar water into her mouth until it is full to treat low blood sugar
4. Separate the cage mate, move her to a quiet dark box, record the seizure's duration and appearance, and go to the vet immediately while watching her temperature

AnswerD. Separate the cage mate, move her to a quiet dark box, record the seizure's duration and appearance, and go to the vet immediately while watching her temperature

ExplanationSeizures and loss of consciousness are immediate-visit criteria. During and right after a seizure, putting fingers or objects in the mouth causes bites or choking and is strictly forbidden; remove hazards and the agitated cage mate, and rest her in a quiet dark box to prevent recurrence. Recording the seizure's duration, frequency and appearance helps the vet's diagnosis. Holding her risks a fall or compression if it recurs, and returning her to the usual cage means another fall from the branches. Even if low blood sugar is suspected, pouring liquid into a semi-conscious animal causes aspiration; sugar water should only be dabbed on the corner of the mouth if she is conscious. A hot body may also mean heatstroke, so transport her in a cool environment.

IssuesThe drop in appetite during the day went unheeded and warning signs of the seizure may have been missed. The owner did not know the seizure procedure in advance (nothing in the mouth, record, go immediately).

ImprovementShare the family rule for seizures: nothing in the mouth, make the surroundings safe, record the time and appearance, go immediately. Consult the vet early about reduced appetite or sluggishness. Keep a dark warming box and the emergency hospital's number ready, and be prepared to record a video to show the vet.

At night, in a rank fight, a 2-year-old male was bitten deeply on the left forearm by his father. You separated him, but bright red blood keeps pulsing from the wound and the gauze was soaked within minutes. He is gradually becoming quiet and his gums look pale. The nearby animal hospital is closed.

At this point, which is the most appropriate response?

1. Change the gauze frequently to check the bleeding and wait for it to stop
2. Press fresh gauze firmly on the wound without lifting it, press lightly on the heart side of the arm, keep him warm, call the emergency (after-hours) animal hospital and transport him immediately
3. Apply superglue to the wound to stop the bleeding
4. Tie the whole arm tightly to stop the bleeding and watch until morning

AnswerB. Press fresh gauze firmly on the wound without lifting it, press lightly on the heart side of the arm, keep him warm, call the emergency (after-hours) animal hospital and transport him immediately

ExplanationBright red blood pulsing from a wound is arterial bleeding, and in a 300–500 g marmoset even a small blood loss can be fatal. Pale gums and growing quietness are signs of hemorrhagic shock and require an immediate visit. Press clean gauze for 5+ minutes without lifting it, press lightly on the heart side of the limb to reduce bleeding, keep him warm, call the emergency hospital and transport him. Changing the gauze frequently tears away the forming clot and the bleeding continues. Superglue damages tissue and becomes a source of infection. Tying the whole arm tightly causes necrosis, and waiting until morning means death from blood loss.

IssuesPreparations against rank fights (several hides and feeding stations) were inadequate, allowing a deep bite. No nighttime emergency contact had been decided, and knowledge of how to stop bleeding (do not lift the pressure) was lacking.

ImprovementProvide more hides and feeding stations than there are animals, and separate early at any sign of fighting. Keep clean gauze on hand and share with the family: press for 5+ minutes without lifting, press lightly on the heart side. Identify in advance an emergency hospital that sees primates at night and note its number.

9 p.m. on an autumn night. A 7-year-old male sits on a branch with his mouth open, his chest moving rapidly. Counting, it is over 80 breaths a minute. He stretches his neck, looks distressed and does not call. His body temperature feels normal. His female cage mate is fine. There are no injuries and nothing unusual happened today.

Which is the most appropriate response for the owner?

1. Treat it as breathlessness after exercise and let him rest in the nest box until morning
2. Lay him on his back and press on his chest to make him breathe deeply
3. A breathing rate nearly double normal and open-mouth breathing are emergency signs: do not disturb him, put him in a dark warm box and go to the vet immediately
4. Direct humidifier steam at his face to ease his breathing and watch

AnswerC. A breathing rate nearly double normal and open-mouth breathing are emergency signs: do not disturb him, put him in a dark warm box and go to the vet immediately

ExplanationA marmoset's normal breathing rate is about 30–50 per minute; over 80 with open-mouth breathing and a stretched neck is a sign of severe respiratory distress and meets the immediate-visit criterion. Animals in respiratory distress can crash when disturbed, so do not hold him or change his position; put him in a dark, warm box and transport him quietly. Causes range from heart disease to pneumonia or fluid in the chest and cannot be judged at home. Assuming post-exercise breathlessness and waiting until morning risks death by suffocation. Laying him on his back and pressing the chest further obstructs breathing and worsens things through panic. Steam is no treatment and wastes time.

IssuesThere was no habit of counting breaths and the normal rate was unknown, so judging urgency was difficult. The owner was not sufficiently aware of the risk of respiratory and heart disease in an older animal.

ImprovementLearn the normal breathing rate (30–50 per minute) and heart rate (around 200) and observe them routinely. Make open-mouth or rapid breathing an automatic immediate visit. Have older animals checked every six months and keep the emergency hospital's number on hand.

A winter night. A 5-year-old female, limp and cold to the touch, has to be taken to the emergency (after-hours) hospital, a 40-minute drive. The outside temperature is 3°C. The owner, in a hurry, is about to put her in a carrier with nothing in it. Her male cage mate is calling loudly from the cage.

Which is the most appropriate transport preparation?

1. Time is short, so put her in the bare carrier, leave quickly and drive with the heating off
2. Put a bottle of hot water directly into the carrier, pressed against her body
3. The male is noisy, so shut him in another room and take the female alone
4. Line a small box with a towel, add heat packs wrapped in cloth, bring the male along if possible, warm the car to 24°C or above and set off

AnswerD. Line a small box with a towel, add heat packs wrapped in cloth, bring the male along if possible, warm the car to 24°C or above and set off

ExplanationWhen transporting an animal that is cold to the touch, warmth is the top priority: line a small box with a towel, add heat packs wrapped in cloth, and keep it dark. Bringing a companion along if possible reduces stress for a group-living animal like the marmoset and helps maintain body temperature. Keep the car at 24°C or above so hypothermia does not worsen during a journey in 3°C outside air. A bare carrier with the heating off lets her temperature fall further over 40 minutes. Direct contact with a hot bottle causes low-temperature burns. Leaving the cage mate behind increases anxiety for both animals, and a companion's calls also help with resuscitation and rest. Calling the hospital before leaving with your arrival time and her condition makes admission smoother.

IssuesAn emergency transport kit (small box, towel, heat packs) had not been assembled in advance, and in the rush the owner nearly skipped warmth. The owner also did not know the group-animal consideration of transporting with a companion.

ImprovementKeep a transport kit of a small box, towel, disposable heat packs and a spare carrier together in one place. Confirm the emergency hospital's number and route, and set the step of calling before departure. Keep records so that weight trend, diet, stool photos and cage mates' condition can be brought along.

11 p.m. on a Saturday. A 4-year-old male has not eaten since the evening and his stool is slightly loose. However, he can climb the branches, responds when called, and his body is warm. His female cage mate is normal. Your regular vet is closed until Monday, and the emergency (after-hours) hospital is an hour's drive away and says it has little experience with primates. The owner is unsure what to do.

Which is the most appropriate decision in this situation?

1. Go to the emergency hospital right now and get some kind of treatment even without primate experience
2. Keep him warm, dab a little sugar water on the corner of his mouth, phone the emergency hospital for advice, go immediately if he worsens before morning (limp, cold, bloody or watery stool), and see a vet the next day if he has not improved
3. He does not seem that bad, so do nothing and wait until the regular vet opens on Monday
4. Give a small dose of a human antidiarrheal and let him sleep until morning

AnswerB. Keep him warm, dab a little sugar water on the corner of his mouth, phone the emergency hospital for advice, go immediately if he worsens before morning (limp, cold, bloody or watery stool), and see a vet the next day if he has not improved

ExplanationHe does not currently meet the immediate-visit criteria (seizures, unconscious, cold body, open-mouth breathing, unable to move after a fall, bloody or watery stool with lethargy): he is responsive and warm. However, because small animals develop low blood sugar and dehydration quickly, it is sensible to keep him warm, dab a little sugar water on the corner of the mouth if conscious, and phone the emergency hospital for advice. '24 hours without eating' and 'diarrhea for 2 days or more' are same-day criteria, so go immediately if he worsens before morning and see a vet the next day if he has not improved. A long-distance transport to an inexperienced hospital is itself a risk of stress and heat loss. Doing nothing until Monday is dangerous because the fast becomes far too long. A human antidiarrheal is wrongly dosed and masks the cause while making things worse.

IssuesThe owner had not identified in advance a vet that sees primates or where to go on weekends, and so hesitated when it mattered. The criteria for judging urgency (go immediately vs same day) were not understood.

ImprovementIdentify several primate-capable vets and weekend and after-hours options in advance, and build a relationship that allows phone consultation. Print the immediate-visit and same-day criteria and post them near the cage. Keep a warming box, sugar and weight records on hand, and share the nighttime observation points (temperature, responsiveness, stool) with the family.