Opossum case method: 50 questions

At 10 p.m., a 1-year-old Virginia opossum on free-roam time in the living room was startled by the neighbor's dog barking loudly and keeled over onto its side. Its mouth is half open with the tongue out, the body is stiff, and there is a sharp foul smell. It does not respond at all when called or when its feet are poked. The body feels warm to the touch, and on close inspection the belly is rising and falling slightly.

What is the most appropriate first action in this situation?

1. Decide it has died, shake the body, and start chest compressions
2. Treat it as playing dead, return it to a dark, quiet nest box, and watch its breathing without touching it
3. Splash cold water on its face to stimulate it awake
4. Leave it on the floor as is and check again the next morning

AnswerB. Treat it as playing dead, return it to a dark, quiet nest box, and watch its breathing without touching it

ExplanationWhen startled, opossums play dead (thanatosis), release a foul smell, and stay motionless for minutes to hours. This is a normal defensive response; a warm body and a rising and falling chest prove it is breathing. The correct answer is to place it in a dark, quiet spot and watch its breathing without touching it. Chest compressions on an animal with breathing and a heartbeat risk rib fractures. Cold water pushes an already low-temperature opossum into hypothermia. Leaving it on the floor risks chilling and being stepped on. If it is still unresponsive after several hours, the body turns cold, or breathing can no longer be seen, see a vet immediately.

IssuesThe owner did not know about thanatosis, a species-specific response, mistook it for death, and nearly performed excessive treatment. Loud outside noise was not blocked during free-roam time, creating a highly stressful environment for a timid animal.

ImprovementShare how to recognize playing dead (body temperature, chest movement, recovery within hours) with the whole family. Hold free-roam time with windows closed during quiet hours, and provide a fabric tunnel or paper bag it can dive into when startled. Keep an after-hours vet on record in case it does not recover.

A 6-month-old Virginia opossum. Because it eats them eagerly, the owner has been feeding mainly boiled chicken and fruit. Tonight, looking in the cage, its hind legs wobble side to side and it slipped and fell while trying to climb a branch. On closer inspection, its back is slightly hunched and it is small for its age. When approached, it dragged its hind legs and fled into the nest box.

What is the most appropriate first action in this situation?

1. Assume lack of exercise, add more climbing branches, and extend free-roam time every night
2. Crush a human calcium supplement into its food and watch for a week
3. Suspect a fracture, look up splinting online, and splint the leg with chopsticks
4. Put it in a small box, keep it still and warm, and see an exotic-animal hospital the same day

AnswerD. Put it in a small box, keep it still and warm, and see an exotic-animal hospital the same day

ExplanationA diet of only meat and fruit causes calcium deficiency and excess phosphorus, leading to metabolic bone disease. Wobbly hind legs, a curved back, and poor growth are classic signs, and the bones are brittle and fracture easily. The correct answer is to restrict movement in a small box, keep it warm, and see a vet the same day. More exercise will break the weak bones. Giving calcium on your own can worsen things if the ratio to vitamin D3 or the dose is wrong, and the manual prohibits it. Amateur splinting causes pain and cuts off blood flow. Tell the vet exactly what it has been fed.

IssuesDietary mismanagement: instead of high-quality cat or ferret food as the staple, the diet was skewed toward meat and fruit based purely on preference. Lack of knowledge about the nutrients needed for bone formation during growth, and the early warning of stunted size was missed.

ImprovementSwitch the staple to a complete diet containing calcium and vitamin D3, and keep fruit under 20% of the diet. Make weekly weigh-ins and monthly records of body size and gait a habit, and see a vet after even a single wobble or fall.

A 2-year-old small South American opossum weighing 300 g. Possibly because it was given too much fruit last night, there have been watery stools in several places on the bedding since this morning. By evening it has not stopped; the rear end is soiled, and when it comes out of the nest box it does not go to the water bowl and moves sluggishly. It feels light when held, and when the skin is pinched it is slow to return.

What is the most appropriate first action in this situation?

1. Give lukewarm water in small amounts, keep it warm, and see a vet the same day with a stool sample
2. Give a small dose of human anti-diarrheal medicine and watch until tomorrow
3. Fast it to rest the gut and give nothing for 2–3 days
4. Rehydrate with chilled fruit, cool the cage, and let it rest

AnswerA. Give lukewarm water in small amounts, keep it warm, and see a vet the same day with a stool sample

ExplanationAlthough small species have small bodies and slow metabolisms, continued diarrhea dehydrates them within half a day. Slow skin return and weight loss are signs that dehydration is already advanced. The correct answer is to give lukewarm water in small amounts, keep it warm, and see a vet the same day with a stool sample. Human anti-diarrheals are dosed wrong and dangerously stop gut movement. Fasting a small species hastens hypoglycemia and weakness. Fruit worsens diarrhea, and cooling is forbidden for a low-temperature animal like the opossum. Diarrhea lasting more than half a day is the threshold for a same-day visit.

IssuesOverfeeding fruit, a dietary management error, was the trigger. The owner did not know that small species dehydrate within half a day and hesitated to seek care until evening. There was no habit of recording or saving stool samples.

ImprovementLimit fruit to under 20% of the diet, once per night. Note the time and number of abnormal stools and save a sample wrapped in plastic. Get a fecal exam right after acquisition and yearly, and set a rule to see a vet once diarrhea lasts half a day.

A 3-year-old Virginia opossum. For the past week, there has been a stronger odor than before when the cage is opened. Tonight the fur on its chest is damp with drool, and it chews food from the bowl only on the right side, dropping pieces. Gently looking in the mouth, the gum at the back left is red and swollen. It has an appetite but takes a long time to finish eating.

What is the most appropriate first action in this situation?

1. Give hard bones to scrape off plaque and see whether the bad breath goes away
2. Apply a human mouth-ulcer medicine to the gums with a cotton swab for a week
3. Soften the food to make it easier to eat and get an oral exam within a few days
4. Consider bad breath normal for an omnivore and do nothing in particular

AnswerC. Soften the food to make it easier to eat and get an oral exam within a few days

ExplanationOpossums have 50 teeth, so periodontal disease and broken teeth are common. Bad breath, drooling, chewing on one side, and red gums are classic signs of periodontal disease. The correct answer is to soften the food to reduce pain and get a vet's oral exam within a few days. Hard bones cause broken teeth. Human medicines have the wrong ingredients and doses and can be licked off and cause poisoning. Left untreated, a root abscess progresses to facial swelling and total loss of appetite. If the face swells or it stops eating entirely, see a vet the same day.

IssuesThe early sign of bad breath a week earlier was ignored, allowing it to progress to the obvious stage of drooling and dropped food. Weekly oral checks and the yearly dental exam were not being done.

ImprovementMake a habit of checking breath and gum color once a week. Do not give overly hard bones, and get a yearly dental exam at an exotic-animal hospital. Record changes in eating speed and chewing, and see a vet early when one-sided chewing is noticed.

A 4-year-old senior Virginia opossum. The owner often gave fatty chicken skin and cheese as treats. Recently, at night it bumps into climbing branches and the food bowl in the cage and hesitates to climb into the hammock. Under a flashlight, the centers of both eyes are cloudy white. Its weight has increased by 1 kg in six months to 4.5 kg, and it moves sluggishly.

What is the most appropriate action in this situation?

1. Keep bright lights on all night to get its eyes used to the light and restore vision
2. Keep the cage layout unchanged, stop high-fat treats, and get an eye exam within a few days
3. Apply human eye drops three times a day and see whether the cloudiness clears
4. Accept it as old age and remove all climbing branches so it cannot bump into them

AnswerB. Keep the cage layout unchanged, stop high-fat treats, and get an eye exam within a few days

ExplanationCataracts and retinal degeneration in opossums are often caused by high-fat diets and obesity. Cloudy eyes and bumping into things at night are the signs. The correct answer is to keep the cage layout unchanged so an animal that cannot rely on sight can move from memory, stop fatty treats, and get an exam including the eyes within a few days. Bright lighting is highly stressful for a nocturnal animal. Human eye drops have the wrong ingredients and can make things worse. Removing all climbing branches leads to lack of exercise, worsening obesity and bone weakness. If there is sudden blindness or it keeps rubbing its face from eye pain, see a vet the same day.

IssuesHigh-fat treats became routine, and a 1 kg weight gain over six months was overlooked. The owner did not know obesity leads to eye disease and fatty liver, and misread hesitation to climb, an early sign of visual impairment, as old age.

ImprovementReplace chicken skin and cheese with small amounts of boiled egg or insects a few times a week. Weigh weekly and revise the diet at a change of 5% or more. Ask for an eye check at routine exams, and for an animal with failing vision, keep the cage layout fixed and lay mats on the floor.

A 2-year-old small opossum. Normally it leaves the nest box 30 minutes after lights-out and starts eating, but last night the food was untouched and the water level had not dropped. Tonight at 11 p.m., peeking into the nest box, it is curled up with its eyes narrowed and its nose is dry. When lifted it is limp, without its usual resistance. The room temperature is a fine 24°C.

What is the most appropriate action in this situation?

1. Assume it is just sleepy and wait until tomorrow night
2. Put its favorite fruit in the nest box and watch for a few days to see if its appetite returns
3. Force its mouth open and push food in to provide nutrition
4. Increase heating and contact an exotic-animal hospital tonight for a visit

AnswerD. Increase heating and contact an exotic-animal hospital tonight for a visit

ExplanationA nocturnal opossum that stays inactive at night and has not eaten or drunk for a second day meets the manual's same-day visit criteria. Despite their apparently slow metabolism, small species tolerate fasting poorly, and dehydration and hypoglycemia progress rapidly. The correct answer is to increase heating and contact a hospital that same night for a visit. Waiting until tomorrow is dangerous. Fruit alone does not address the underlying cause and triggers diarrhea. Forced feeding carries a high risk of aspiration and should not be done without knowing the cause. Bring weight, diet, heating setup, and a photo of the stool to the visit.

IssuesThe owner noticed the clearest signs, uneaten food and undrunk water, but left it for a day. They did not understand how serious it is for a nocturnal animal not to come out at night, and had no after-hours vet lined up.

ImprovementMake a checklist to record food and water consumption and stool each morning. Set a rule to see a vet after a full day without eating, and post the phone number of an after-hours exotic-animal hospital on the cage. Weigh weekly to know the baseline.

On a winter morning, the tail of a 2-year-old Virginia opossum shows about 3 cm from the tip that is blackish, dry, and flaky. A week ago the tail was caught in the cage door; it bled a little then, but the bleeding stopped so it was left alone. The area does not respond to touch, and the boundary is slightly red and swollen. The animal is eating normally.

What is the most appropriate action in this situation?

1. Recognize the start of necrosis and see a vet the same day
2. Apply hand cream to moisturize and watch for a week
3. Cut off the black part yourself with sterilized scissors
4. Assume it is fine since it is eating and wait for the tip to fall off naturally

AnswerA. Recognize the start of necrosis and see a vet the same day

ExplanationThe opossum's tail is a grasping organ; when it is crushed and blood flow is cut off, the tip dies back. A black, dry, numb area with a red, swollen boundary means necrosis is progressing and infection has begun. The manual also calls for a same-day visit when the tail tip turns black. The correct answer is to see a vet the same day. Moisturizing will not restore blood flow, and necrosis spreads toward the base. Cutting it yourself causes bleeding, infection, and severe pain. Even with an appetite, necrosis can progress to systemic infection, so do not wait. Surgical removal and antibiotic treatment by a vet are needed.

IssuesThe crushing accident a week earlier was dismissed because the bleeding stopped, and the tail was not monitored afterward. There was no habit of checking the tail before closing the cage door, and winter dryness worsened the tail's condition.

ImprovementAlways check the tail position before closing the door, and pad the door gap with cushioning. After any tail injury, check the tip's color and temperature daily and see a vet immediately if it discolors. Keep humidity at 50–60% in winter to prevent tail dryness.

At 1 a.m., a 1-year-old small opossum playing on a 1 m high climbing branch lost its balance, and there was the sound of it hitting the hard floor. On rushing over, it is holding up its right hind leg, walking on three legs, and crouching in a corner of the cage. The ankle area is starting to swell, and it hisses sharply when touched. There is no bleeding.

What is the most appropriate first action in this situation?

1. Pull on the leg to check bone position and straighten it
2. Give a rice-grain-sized dose of human painkiller for the pain
3. Put it in a small box lined with a towel, keep it warm, and see a vet the same day
4. Watch until morning and skip the vet if it can walk

AnswerC. Put it in a small box lined with a towel, keep it warm, and see a vet the same day

ExplanationHolding up a swollen leg after a fall strongly suggests a fracture or dislocation. The correct answer is to restrict movement in a small box, keep it warm, and see a vet the same day. A small box reduces movement of the injured area and prevents worsening. Pulling on the leg to realign it causes severe pain and damages vessels and nerves. Human painkillers are dosed wrong for opossums and risk liver and kidney damage. Walking on three legs does not rule out a fracture; left untreated it leads to malunion or necrosis. A same-day visit is the standard; if the leg does not move at all or is cold, see a vet immediately.

IssuesNo thick mat had been laid under the climbing branch, so there was nothing to cushion a fall onto the hard floor. The owner underestimated that arboreal animals still fall, and had not identified a vet available for nighttime falls.

ImprovementAlways lay a thick mat or fleece under climbing branches and hammocks. Use branches of stable thickness and check their mounting weekly. Keep a small transport carrier and hot-water bottle within easy reach and have an after-hours vet on record.

A 1-year-old Virginia opossum is kept in an 80 cm wide wire cage. The sound of gnawing on the mesh continued through the night, and in the morning the skin on its nose is scraped off and oozing blood, with blood on the mesh too. The animal is calm and has an appetite. The wound is shallow but wide, and the redness extends to the base of the whiskers.

What is the most appropriate first action in this situation?

1. Spray rubbing alcohol on the wound and let it dry
2. Rinse the wound with saline, press the bleeding with gauze, and consider switching to a larger cage
3. Dust flour on the wound to clot the bleeding
4. Put an adhesive bandage on the wound to protect the nose

AnswerB. Rinse the wound with saline, press the bleeding with gauze, and consider switching to a larger cage

ExplanationRubbing the face on wire mesh is an injury specific to opossums, caused by persistent gnawing on the mesh from cramped conditions or stress. The correct answer is to rinse the wound with saline, apply gauze pressure to the bleeding, and consider switching to fine mesh or an acrylic cage with more space. Alcohol causes severe pain and tissue damage. Flour remains in the wound as a foreign body and causes infection. A bandage will not stick to the nose, tears the wound open when removed, and may be swallowed. If the wound becomes infected, swells, or the nosebleed will not stop, see a vet the same day. Virginia opossums need a cage at least 120 cm wide.

IssuesThe cage was far too small for a Virginia opossum and the mesh too coarse, so face-rubbing became habitual. The owner heard the nighttime gnawing but did not investigate, leaving it until the wound had spread.

ImprovementHouse Virginia opossums in a tall cage at least 120 cm wide, with fine mesh or acrylic walls. Satisfy nighttime exploration needs with climbing branches and foraging puzzles. Keep saline and clean gauze in the first-aid kit and check wounds daily.

On a January night, the owner had placed an uncovered panel heater directly on the cage floor. In the evening, a 3-year-old small opossum had been sleeping on it for a long time; the skin on the thinly furred part of its belly has turned dark red, with small blisters in places. The animal shows little sign of pain but dislikes having the area touched when held.

What is the most appropriate first action in this situation?

1. Pop the blisters with a needle to drain the fluid and disinfect
2. Apply a thick layer of human burn ointment and watch
3. Judge it mild since it is not in pain and keep using the heater as is
4. Cool the area with a wet towel, remove the heater, and see a vet the same day

AnswerD. Cool the area with a wet towel, remove the heater, and see a vet the same day

ExplanationWith their low body temperature and slow metabolism, opossums do not move away from warm spots and easily get low-temperature burns from uncovered heaters. Dark red discoloration and blisters indicate damage to the deep layers of skin, and the manual calls for a same-day visit. The correct answer is to cool the area with a wet towel, remove the heater that caused it, and see a vet the same day. Popping blisters opens a route for infection. Human ointment may be licked off and cause poisoning, and prevents proper wound assessment. Lack of pain may mean nerve damage and is no basis for calling it mild. Low-temperature burns spread necrosis over several days, so early treatment is important.

IssuesThe heater was placed uncovered directly on the floor, a setup the manual prohibits. The owner did not know opossums will not move away from a heat source on their own and allowed prolonged contact.

ImprovementAlways cover panel heaters and mount them on the cage side or outside the nest box so they cannot be touched directly. Put a thermometer in the cage and create both a warm zone and a cool zone. Make a habit of checking the underside skin on winter mornings and evenings.

At 11 p.m., when lifting a 2-year-old Virginia opossum for nail trimming, the owner was bitten on the index finger down to the base. Fifty sharp teeth are dug in and blood is oozing. In pain, the owner instinctively tried to shake the hand, but the opossum widened its eyes and clamped down even harder. The family is startled and shouting.

What is the most appropriate first action in this situation?

1. Stay still and quiet until the grip loosens, and cover its head with a thick towel to darken
2. Shake the hand hard to pull free and return it to the cage right away
3. Strike the nose hard to startle it into opening its mouth
4. Pour water on it so it cannot breathe and wait for it to let go

AnswerA. Stay still and quiet until the grip loosens, and cover its head with a thick towel to darken

ExplanationA startled opossum freezes further and bites harder. The correct answer is to stay still and quiet until the grip loosens, and cover its head with a thick towel to darken. If it still will not release, slip a pen or similar into the corner of the mouth and open it slightly. Shaking the hand makes the teeth tear the skin, deepening the wound, and the opossum falls. Hitting and shouting are prohibited by the manual and make it freeze harder from fear. Water risks hypothermia and aspiration. Once released, return it to the nest box and leave it until calm; wash the wound under running water and apply pressure. Deep bite wounds easily become infected; see a doctor if there is swelling or fever.

IssuesA timid nocturnal animal was forcibly picked up just before its active hours, and nail trimming, a procedure it dislikes, was started without preparation. Bite-release steps had not been shared with the family, leading to dangerous reactions such as shouting and shaking.

ImprovementTrim nails with the animal wrapped in a thick towel in the dark, and finish quickly. Acclimate it a little each day, and have the vet do it if it is not possible. Write the bite-release steps (stay still, darken, open with a pen) on paper, post it, and have the whole family read it.

At 9 p.m., just as a 1-year-old Virginia opossum on free-roam time was passing through a door gap, a family member closed the door. The middle of the tail was caught, and it fled with a scream. Drops of blood are on the floor, and red blood keeps flowing from a cut in the middle of the tail. The animal is hiding under a shelf and will not come out.

What is the most appropriate first action in this situation?

1. Do not drag it out; leave it until the bleeding stops on its own
2. Cool the tail tip with ice and wait for the pain to subside
3. Catch it quietly, press the wound with clean gauze for 3–5 minutes, also press lightly on the base side, and see a vet
4. Wrap a rubber band tightly around the tail to stop the blood

AnswerC. Catch it quietly, press the wound with clean gauze for 3–5 minutes, also press lightly on the base side, and see a vet

ExplanationThe tail is rich in blood vessels and tends to keep bleeding, and crushing is a classic accident leading to tail necrosis. The correct answer is to catch it quietly with a towel, press the wound with clean gauze for 3–5 minutes, press lightly on the base side to reduce blood flow for tail bleeding, and see a vet. Left alone, the bleeding continues and it becomes hypothermic in its hiding spot. Ice constricts vessels but is dangerous for a low-temperature opossum and insufficient to stop bleeding. A rubber band tourniquet completely cuts off blood flow and guarantees tail necrosis. The manual says to apply pressure and see a vet if the tail is caught. If bleeding does not stop, keep pressing and transport.

IssuesThe danger of family members opening and closing doors during free-roam time was not shared, and the door was closed without checking the tail. There was insufficient understanding of the opossum's habit of passing through dark gaps.

ImprovementSet a family rule to keep doors fixed open during free-roam time and use doorstops. Check the tail position before closing cage doors and drawers where tails get caught. Keep gauze in the first-aid kit and the transport carrier within easy reach.

Late at night, the owner got up to use the bathroom, walked through the living room without turning on the lights, and stepped on a small opossum (400 g) that was out on free-roam time. After a short scream it stopped moving and is lying on its side with its mouth half open. Breathing is fast and shallow. The 60 kg owner felt their heel land on the animal's torso.

What is the most appropriate first action in this situation?

1. Assume it is playing dead and leave it for a few hours
2. Check movement and breathing, move it to a box without jostling, keep it warm, and see a vet immediately
3. Press hard on the belly with both hands to check the internal organs
4. Pick it up and keep stroking its back to calm it

AnswerB. Check movement and breathing, move it to a box without jostling, keep it warm, and see a vet immediately

ExplanationA small species stepped on by an adult's weight can suffer ruptured organs, broken ribs, or pneumothorax. Fast, shallow breathing is a dangerous sign of chest injury and must be distinguished from playing dead. The correct answer is to check movement and breathing, move it flat into a box without twisting the body, keep it warm, and see a vet immediately. The manual also says to check movement and breathing and see a vet after stepping on it. Assuming thanatosis and leaving it can lead to death from internal bleeding. Pressing hard on the belly spreads the damage. Holding and stroking moves fractured areas and impedes breathing. Labored or open-mouth breathing is a criterion for an immediate visit.

IssuesDespite knowing the most common risk, the animal being underfoot in a dark room, the owner walked without lights during free-roam time. The opossum was left loose late at night, when family movement overlapped with free-roam time.

ImprovementAlways keep lights on during free-roam time and shuffle your feet. Limit nighttime free-roam to the 1–2 hours the owner can supervise, and always return it to the cage afterward. Hang a sign on the door during free-roam time so family members outside the room know.

At 7 a.m., the cage door of a 2-year-old small opossum is open and it is gone. It seems the door latch was not locked last night. The house has two floors; the living room windows are closed, but there are gaps at the kitchen vent and behind the washing machine. The whole family has started calling its name, moving furniture to search, and is preparing to vacuum.

What is the most appropriate action in this situation?

1. Turn all lights to maximum, call loudly, and move all the furniture
2. Assume it will come back on its own by night and leave the cage door open
3. Startle it out of its hiding place with the noise of the vacuum cleaner
4. Stay quiet, search dark narrow spaces one by one, and set out food and the nest box to wait for it to emerge at night

AnswerD. Stay quiet, search dark narrow spaces one by one, and set out food and the nest box to wait for it to emerge at night

ExplanationOpossums are nocturnal; once escaped, they hide and sleep in dark narrow spaces during the day. The correct answer is to search quietly without commotion through dark narrow spots such as behind furniture, behind the washing machine, and around the vent, and if not found, set the familiar nest box and food on the floor and wait for it to emerge during its active hours at night. Loud voices, bright lights, and vacuum noise startle it into playing dead or retreating deeper. Moving furniture risks crushing it. Leaving things alone lets it get outside through a window or vent, and it cannot survive outdoors. First block exits to the outside and move dogs and cats to another room.

IssuesA simple management error, forgetting to lock the door, led to the escape. Gaps and vents in the house had not been blocked, and the family began a noisy search without knowing how to find a nocturnal animal.

ImprovementFit the cage door with a padlock or snap hook and point-and-check after closing. Block room gaps and vents in advance. Write out the escape procedure (search dark spots quietly, set out nest box and food, close exits) and share it with the family.

A 1-year-old Virginia opossum was lifted in one hand to show a visitor; it struggled and fell to the floor from chest height. Right after landing it ran back to the cage and went into the nest box. Ten minutes later it is curled up but responds to being called, and its breathing looks normal. However, it is not using its left front leg much and pulls it back when it touches the floor.

What is the most appropriate action in this situation?

1. Do not handle it; rest and observe it in a box, and see a vet the same day if it keeps favoring the leg
2. Judge it unhurt since it ran back, and continue showing it to the visitor
3. Extend the leg yourself to check for bone abnormalities
4. Give sugar water and put it to bed to ease the shock of the fall

AnswerA. Do not handle it; rest and observe it in a box, and see a vet the same day if it keeps favoring the leg

ExplanationRight after a fall, adrenaline often masks pain and the animal can run, but favoring a front leg is a sign of a fracture, crack, or dislocation. The correct answer is to avoid handling it, rest and observe it in a small box, and see a vet the same day if it keeps favoring the leg, the leg swells, or it resists being touched. Running back must not be taken as proof it is unhurt. An amateur extending the leg worsens a fracture and gets bitten from the pain. Sugar water is pointless and causes aspiration or diarrhea. If it still does not use the leg after several hours, becomes limp, or breathes fast, see a vet immediately.

IssuesThe animal was picked up outside its active hours to show a visitor, and held incorrectly with one hand. The owner did not know the basics of supporting the chest and tail base when holding, and underestimated how stressful visitors are for a timid animal.

ImprovementWhen holding, support the chest and tail base with both hands, in a low position close to the floor. Do not force it out for visitors; let them observe it quietly in the cage. For 24 hours after a fall, record leg use, appetite, and breathing, and see a vet if anything is abnormal.

At night, a 1-year-old small opossum (500 g) on free-roam time tore open a chocolate bar wrapper left on the table and ate about 10 g. It was discovered 15 minutes after eating. So far it is moving around energetically, but there is brown residue around its mouth. The owner looked online and is about to make it vomit with salt water.

What is the most appropriate first action in this situation?

1. Make it vomit with salt water and watch once it has vomited
2. Give milk to dilute the toxin
3. Do not force vomiting; note the amount and type of chocolate and contact a hospital immediately
4. Assume it is fine since it is lively and watch until the next day

AnswerC. Do not force vomiting; note the amount and type of chocolate and contact a hospital immediately

ExplanationChocolate is a prohibited food in the manual, and for a 500 g small species even 10 g can be a dangerous amount. Poisoning symptoms appear hours later, so being lively now is no reassurance. The correct answer is not to force vomiting at home, but to note the amount, type, and time eaten, contact a hospital immediately, and follow their instructions for a visit. Salt water causes salt poisoning and is extremely dangerous for opossums. Milk is also prohibited by the manual, causes diarrhea, and has no diluting effect. Waiting until the next day will be too late for treatment. Caught early, the hospital can induce vomiting properly or give activated charcoal.

IssuesThe basic step of removing hazards before free-roam time was neglected, leaving food on the table. The owner underestimated the habit of putting anything in its mouth and nearly carried out a dangerous salt-water emesis based on misinformation online.

ImprovementAlways clear food, cords, and houseplants before free-roam time and leave the table empty. Write the principle for poisoning (do not induce vomiting at home; contact the hospital) in the emergency notes. Confirm the number of an exotic-animal hospital that can be called at night.

Three days ago, during free-roam time, a 2-year-old Virginia opossum picked up a rubber band from the floor and swallowed it before it could be taken away. It ate normally for the next two days, but since last night its appetite has dropped and there was no stool this morning. Tonight it vomited once and curls up in displeasure when its belly is touched.

What is the most appropriate action in this situation?

1. Give vegetable oil to lubricate the rubber band and wait for a bowel movement
2. Suspect intestinal obstruction, stop feeding, and see a vet the same day
3. Massage the belly to push the rubber band out
4. Give a large amount of high-fiber vegetables to flush it through

AnswerB. Suspect intestinal obstruction, stop feeding, and see a vet the same day

ExplanationOpossums put anything in their mouths, and rubber bands and plastic easily block the intestine. Loss of appetite, no stool, vomiting, and abdominal pain after ingestion is the classic course of intestinal obstruction, and the manual calls for a same-day visit if there is vomiting or no stool. The correct answer is to stop feeding and see a vet the same day. Oil causes aspiration or diarrhea and does not clear the blockage. Abdominal massage risks intestinal damage or perforation. Large amounts of vegetables pile up in front of the blockage and make it worse. Left untreated, intestinal necrosis is life-threatening. Tell the hospital when and what was swallowed.

IssuesFree-roam time was started with a rubber band, an easily swallowed object, left on the floor. The owner did not see a vet right after the swallowing, was reassured by two days of normal eating, and had no habit of checking stool.

ImprovementBefore free-roam time, inspect the floor at eye level and remove threads, rubber bands, and plastic. If a foreign object is swallowed, consult a hospital the same day. Record the number and shape of stools every morning so that a lack of stool is noticed.

After dinner, on a table that had not yet been cleared, a 3-year-old small opossum was found eating a salad containing avocado and onion. The amount eaten is unknown, but the plate is about half empty. Thirty minutes after discovery, it began breathing fast with its mouth open and became sluggish. It is 11 p.m. and the regular vet is closed.

What is the most appropriate action in this situation?

1. Give plenty of water to dilute it and watch until morning
2. Give a human stomach medicine to suppress symptoms
3. Let it rest in a dark nest box until breathing settles, then go to the regular vet in the morning
4. Note what it ate, phone an after-hours exotic-animal hospital, and go immediately

AnswerD. Note what it ate, phone an after-hours exotic-animal hospital, and go immediately

ExplanationAvocado and onion are prohibited foods in the manual; avocado damages the heart and breathing, and onion damages red blood cells. Open-mouth rapid breathing and reduced movement are signs that poisoning symptoms have already begun, meeting the manual's criteria for an immediate visit. The correct answer is to note what it ate, contact an after-hours hospital, and go immediately. Water alone does not remove the toxin. Human stomach medicine is ineffective and potentially harmful. Leaving breathing abnormalities until morning carries a high risk of death. Small species weigh little, so even small amounts easily become severe.

IssuesClearing up after the meal was postponed, leaving foods containing prohibited avocado and onion within the opossum's reach. No after-hours emergency vet had been identified in advance, nearly delaying the response while the regular vet was closed.

ImprovementAlways clear away human food before letting the opossum out, and keep food in lidded containers. Post the list of prohibited foods (chocolate, onion, avocado, grapes, raw meat, milk) on the refrigerator. Research and register two after-hours exotic-animal hospitals.

Late on a February night, heavy snow caused a power outage. The air conditioner and panel heater stopped, and the room temperature fell to 15°C within three hours. A 2-year-old small opossum is curled up in its nest box, moving sluggishly, and feels cool to the touch. There is no word on when power will return; there is a car but little gas. A portable gas stove, a hot-water bottle, and disposable hand warmers are available.

What is the most appropriate action in this situation?

1. Place a cloth-wrapped hot-water bottle beside the nest box, cover the whole cage with a blanket, and keep warm while checking the temperature
2. Put disposable hand warmers directly inside the nest box, pressed against the body
3. Place the cage next to the flame of the portable gas stove to warm it
4. Put it inside your clothes and sleep with it until morning

AnswerA. Place a cloth-wrapped hot-water bottle beside the nest box, cover the whole cage with a blanket, and keep warm while checking the temperature

ExplanationOpossums have a low body temperature of about 35°C, their activity drops below 18°C, and chilling is life-threatening. The correct answer is to boil water, place a cloth-wrapped hot-water bottle beside the nest box, cover the whole cage with a blanket to retain heat, and keep warm while checking with a thermometer. Hand warmers placed directly cause low-temperature burns and consume oxygen. Next to the stove flame risks fire and carbon monoxide, and the temperature cannot be controlled. Inside your clothes, you may crush it when rolling over, risk being bitten, and cannot keep it stably warm until morning. If it does not move even once warmed, do not wait for power to return; see a vet.

IssuesThere was no heating backup for a winter blackout, and the temperature drop went unnoticed for three hours. The owner nearly used an incorrect warming method such as applying hand warmers directly, and had no thermometer in the cage to measure room temperature.

ImprovementKeep a hot-water bottle, blankets, and a battery-powered thermometer in the emergency kit, and in winter check the room temperature and blackout procedure before bed. Put a max-min thermometer in the cage. Decide in advance on a relative's home, pet hotel, or evacuation site to rely on in a prolonged blackout.

On an August afternoon, the owner came home to find the air conditioner had switched off on its timer, and the west-facing room was 33°C. A 3-year-old Virginia opossum is stretched out on the cage floor breathing fast with its mouth open. Its chin is wet with drool and it responds poorly to being called. Its body feels hot. There is a frozen water bottle in the freezer.

What is the most appropriate first action in this situation?

1. Submerge the body in ice water to cool it rapidly
2. Turn on the air conditioner, wait until it cools, and see a vet the next day
3. Move it to a cool room, wrap it in a wet towel with a cloth-wrapped frozen water bottle alongside, and see a vet immediately
4. Pour cold water into its mouth to lower body temperature

AnswerC. Move it to a cool room, wrap it in a wet towel with a cloth-wrapped frozen water bottle alongside, and see a vet immediately

ExplanationThe proper range is 22–27°C and summer needs under 28°C; open-mouth rapid breathing and reduced responsiveness at 33°C is heatstroke. Labored or open-mouth breathing meets the criteria for an immediate visit. The correct answer is to move it to a cool room, wrap it in a wet towel, place a cloth-wrapped frozen water bottle alongside, and see a vet immediately while lowering body temperature. Submerging in ice water causes vessel constriction from rapid cooling and shock. Waiting until the next day allows organ damage to progress. Pouring water into a poorly responsive animal causes aspiration. Avoid overcooling during transport, and see a vet even if it recovers.

IssuesThe air conditioner was set on a timer while out in summer, and the cage location in a west-facing room was also inappropriate. No frozen water bottle had been placed in the cage during the hot season.

ImprovementRun the air conditioner continuously in summer and keep the cage out of west-facing sun. When going out, place a cloth-wrapped frozen water bottle in the cage and install a thermometer that can be checked remotely. Write the signs of heatstroke and first aid in the emergency notes.

The owner has had a 2-year-old small opossum for one month. Every morning, the owner washes the feces-soiled cage tray and food bowls bare-handed in the kitchen sink and washes the dishes with the same sponge. This week, a young child developed fever and diarrhea, and the owner has abdominal pain. The opossum is healthy and its stool looks normal.

What is the most appropriate thing to review first in this situation?

1. Keep the care routine unchanged since the opossum is healthy, and just watch the family's health
2. Handle feces with gloves, stop washing in the kitchen, use dedicated tools, and have the family see a doctor and mention the opossum
3. Give the opossum human antibiotics to reduce bacteria
4. Assume it is fine to keep washing in the kitchen as long as the cage is wiped with alcohol daily

AnswerB. Handle feces with gloves, stop washing in the kitchen, use dedicated tools, and have the family see a doctor and mention the opossum

ExplanationOpossums can carry salmonella without symptoms, and contact with feces, food bowls, and the cage is the route of transmission to people. The correct answer is to handle feces with gloves, stop washing in the kitchen and use a dedicated basin and sponge, wash hands thoroughly after care, and have the unwell family members see a doctor and mention that they keep an opossum. A healthy opossum does not rule out carriage. Human antibiotics are pointless and harmful. Wiping the cage alone does not prevent transmission via kitchen dishes and sponges. Take particular care as young children and the elderly are prone to severe illness.

IssuesThe owner did not know about salmonellosis, a zoonosis, or its transmission route, washed feces-soiled equipment in the kitchen, and used the same sponge as for dishes. Hygiene management in a household with a young child was completely lacking.

ImprovementWash cage items with gloves in a dedicated basin in the bathroom or on the balcony, with a separate sponge. Wash hands with soap after care and do not let young children touch the cage. Get a fecal exam right after acquisition, and tell the doctor about the pet if a family member falls ill.

It is day three after bringing home a 1-year-old small opossum from a pet shop. At night it scratches frequently; parting the fur, tiny black insects jump, and there are scabs on the ear edges. The owner also has several red bite-like spots on the arm. The resident ferret's cage is in the same room, and no tests have been done.

What is the most appropriate action in this situation?

1. Apply a dog flea spot-on to the neck and watch
2. Bathe it every day to wash the insects off
3. Keep it outdoors on the balcony until the insects decrease
4. Isolate it in a separate room from the ferret, get a parasite check and treatment from a vet, and consult a dermatologist about the bites on your skin

AnswerD. Isolate it in a separate room from the ferret, get a parasite check and treatment from a vet, and consult a dermatologist about the bites on your skin

ExplanationFleas and mites breed on the body, bite people, and spread to other pets. The correct answer is to isolate it in a separate room from the ferret, get a parasite check and a weight-appropriate treatment prescribed by a vet, replace all bedding, and consult a dermatologist about the bites on your skin. Dog treatments are for a different weight and species and risk poisoning a small opossum. Frequent bathing chills a low-temperature opossum, dries the skin, and does not eradicate fleas. Outdoor housing is prohibited by the manual and exposes it to wild fleas, mites, and predators. A vet parasite check at acquisition is the basic rule.

IssuesNo vet health check or parasite screening was done when bringing home the new animal, and it was housed in the same room as the resident pet without a quarantine period. There was no awareness that fleas and mites are a zoonotic problem.

ImprovementGet a fecal exam and parasite check for a new animal right after acquisition and quarantine it in a separate room for two weeks. Change bedding every 2–3 days and vacuum the room's crevices. Use only vet-prescribed treatments, and tell the dermatologist if a family member is bitten.

At 6 a.m. on a January morning, the owner noticed the heater cord had come unplugged. The room temperature is 14°C. A 1-year-old small opossum is lying outside the nest box, cold to the touch and unresponsive to being called. There is no foul smell; chest movement is hard to see, but with an ear close there is a faint breathing sound. It is unclear whether this is playing dead or hypothermia.

What is the most appropriate first action in this situation?

1. Wrap it in a towel, warm it over 30 minutes with a cloth-wrapped hot-water bottle while checking breathing, and see a vet immediately if it does not move
2. Assume it is most likely playing dead, return it to a dark nest box, and leave it for a few hours
3. Blow hot air from a hair dryer directly on it to warm it rapidly
4. Immerse the body in hot bathwater to raise its temperature

AnswerA. Wrap it in a towel, warm it over 30 minutes with a cloth-wrapped hot-water bottle while checking breathing, and see a vet immediately if it does not move

ExplanationThanatosis occurs right after a scare and comes with a foul smell, but this scene has all the conditions for hypothermia: low room temperature, heater failure, and a cold body. The manual says that when it is hard to tell from playing dead, warm first and check breathing. The correct answer is to wrap it in a towel, warm it slowly over 30 minutes with a cloth-wrapped hot-water bottle while checking breathing, and see a vet immediately if it still does not move once warm. Left alone it will die of hypothermia. A hair dryer or hot water causes rapid warming leading to a drop in blood pressure, shock, or burns. Hypothermia is a life-threatening emergency, and a cold, motionless body meets the criteria for an immediate visit.

IssuesThe unplugged heater cord went unnoticed until morning, and nighttime winter temperature control was left entirely to equipment. A room temperature of 14°C is far below the manual's proper range, and there was no power check or temperature alarm system.

ImprovementCheck the heater's power and cord every night before bed and put a max-min thermometer in the cage. If possible, install a device that alerts when the temperature drops. Keep a hot-water bottle on hand and share the warming method for hypothermia (over 30 minutes) with the family.

At 11 p.m., during free-roam time, a 2-year-old small opossum (350 g) chewed an extension cord and sparks flew. After cutting the power and pulling it away, its body is warm but limp, the mouth is open, and no chest movement has been seen for over a minute. No heartbeat can be felt with a finger on the chest. The after-hours hospital is a 20-minute drive away.

What is the most appropriate action in this situation?

1. Watch in a dark place since it could be playing dead for a few hours
2. Perform large-animal chest compressions, pressing hard on the chest with both palms
3. Squeeze the chest between thumb and index finger, breathe into the nose every 5 compressions, and head to the hospital
4. Put water in its mouth to stimulate it and wait for a response

AnswerC. Squeeze the chest between thumb and index finger, breathe into the nose every 5 compressions, and head to the hospital

ExplanationNo breathing and no palpable heartbeat after electric shock is cardiopulmonary arrest, not playing dead. The correct answer is CPR for small species: squeeze the chest between thumb and index finger, give one breath into the nose every 5 compressions, and have someone drive to the hospital. Thanatosis usually comes with a foul smell and breathing is maintained, so even in a startling situation, switch to resuscitation if breathing cannot be seen. Pressing with both palms crushes the ribs and organs of a 350 g body. Water only causes aspiration and is pointless. Continue resuscitation during transport and call ahead so the hospital is ready. Electric shock can cause pulmonary edema even after recovery, so always see a vet.

IssuesThe basic step of putting away extension cords before free-roam time was neglected, and an animal that chews anything was let loose near a live cord. The owner did not know CPR in advance and had not arranged nighttime transport.

ImprovementCover cords or put them all away before free-roam time, and unplug unused outlets. Write small-species CPR (squeeze between fingers, 5 to 1) on paper and post it. Arrange for a family member to drive to the after-hours hospital while the owner continues resuscitation.

At 2 a.m., a 2-year-old Virginia opossum is dragging its hind legs and drooling from the mouth. The after-hours emergency hospital said on the phone to bring it in right away. The outside temperature is 3°C and the drive takes 40 minutes. On hand are a clear plastic case, a fabric carrier, towels, a hot-water bottle, and a flashlight. A family member says they will film a video to show the vet.

What is the most appropriate transport preparation?

1. Put it in the clear plastic case and film it with the car's interior light on during the drive
2. Line a dark small carrier with a towel, add a cloth-wrapped hot-water bottle, and carry it quietly
3. Hold it on your lap in the passenger seat so it does not get cold
4. Put it in a large cardboard box so it can move freely

AnswerB. Line a dark small carrier with a towel, add a cloth-wrapped hot-water bottle, and carry it quietly

ExplanationThe manual's transport method is to line a dark small carrier with a towel, add a cloth-wrapped hot-water bottle, and carry it quietly. For a timid nocturnal animal, darkness and quiet prevent stress and playing dead, and the hot-water bottle prevents heat loss in 3°C outside air. A clear case, lighting, and filming cause severe stress and worsen symptoms. On your lap it can fall during sudden braking and may bite. A large box lets a possibly fractured leg move and cannot keep it warm. Bring weight, diet, heating setup, and a photo of the stool to the hospital, and phone with your arrival time on the way.

IssuesA dark small carrier for transport had not been prepared in advance, leading to a scramble with whatever was on hand in the middle of the night. The family prioritized filming, showing insufficient consideration for the animal's stress during transport.

ImprovementKeep a dark small carrier, towel, and hot-water bottle together near the entrance. Summarize the information needed for a visit (weight, diet, heating setup, stool photo) on a single card. Agree as a family that filming is only for recording symptoms and that transport is kept dark and quiet.

A 3-year-old Virginia opossum. Every night the owner gave heaping portions of fruit (anything but bananas and grapes) and left cat food available at all times. Its weight rose from 3.2 kg six months ago to 4.4 kg, thick fat has built up at the tail base and neck, and it has stopped climbing the branches. This week its appetite dropped, and looking in the mouth, the gums are slightly yellow.

What is the most appropriate action in this situation?

1. Fast it for two days to slim it down quickly
2. Consider the drop in appetite good for weight loss and just watch
3. Suspect fatty liver and see a vet the same day with diet records and weight
4. Force three hours of free-roam exercise every night

AnswerC. Suspect fatty liver and see a vet the same day with diet records and weight

ExplanationFat at the tail base and neck, sluggishness, reduced appetite, and yellow gums are the signs of obesity and fatty liver listed in the manual. Yellow gums are jaundice, a sign of advancing liver damage, and not eating also meets the same-day visit criteria. The correct answer is to see a vet the same day with diet records and weight. Sudden fasting of an obese animal concentrates fat breakdown in the liver, rapidly worsening fatty liver and threatening life. Mistaking loss of appetite for weight loss and leaving it carries the same danger. Forced prolonged exercise strains the joints and weakened body; weight loss should be gradual under a vet's guidance.

IssuesDietary mismanagement, with overfed fruit and unlimited staple food, led to a nearly 40% weight gain in six months. Weekly weigh-ins were not done, and the sign of reduced activity, no longer climbing, was missed.

ImprovementMeasure the staple food, and limit fruit to under 20% of the diet, once per night. Weigh and record weekly, and revise the diet at a change of 5% or more. Plan weight loss with the vet at a gentle rate of no more than a few percent per month, and encourage exercise with foraging puzzles.

In December, a 2-year-old small opossum is kept in a room dried out by heating (30% humidity). The ear edges are flaky and cracked with oozing blood, and the tail tip looks white and powdery. At night it scratches its ears constantly with its hind feet, and the scratched areas have scabbed over. Appetite and activity are normal; the bedding has not been changed for two weeks.

What is the most appropriate action in this situation?

1. Humidify to 50–60%, change the bedding, and ask a vet about a moisturizer
2. Apply human steroid ointment to the ears and tail to heal them
3. Bandage the ears so it cannot scratch
4. Wash the ears and tail with lukewarm water every day to keep them clean

AnswerA. Humidify to 50–60%, change the bedding, and ask a vet about a moisturizer

ExplanationOpossums need 50–60% humidity; in dry air the ears, tail, and feet become chapped, scabbed, and lose hair. The correct answer is to raise humidity with a humidifier, change the soiled bedding, and ask a vet for a recommended moisturizer. Human steroid ointment can be licked and ingested, thins the skin, and may make things worse. A bandage impedes blood flow to the ear, and it will chew it off and swallow it. Daily washing strips skin oils, worsens dryness, and chills a low-temperature opossum. If cracks are deep, bleeding continues, hair loss spreads, or mites are suspected, see a vet within a few days.

IssuesDryness from heating was not measured, and an inappropriate 30% humidity was maintained. Bedding changes were also far less frequent than the manual's 2–3 days, combining skin irritation with soiling.

ImprovementPlace a hygrometer beside the cage and keep 50–60% with a humidifier in winter. Change bedding every 2–3 days and use an absorbent pad as well. Check the ears, tail, and feet weekly and apply a vet-recommended moisturizer at the first sign of dryness.

A 1-year-old Virginia opossum acquired two months ago. The owner feeds wild-caught crickets and grasshoppers every night. Over the past 10 days its weight has dropped from 3.0 kg to 2.7 kg, and this morning's stool is soft with red blood and clear mucus. The belly is slightly bloated and the rear end is soiled. No fecal exam has been done.

What is the most appropriate action in this situation?

1. Assume the blood is the color of the insects, stop the insects, and watch for a few days
2. Give an over-the-counter dog or cat dewormer
3. Give chilled water to stop the bleeding and let it rest
4. Stop wild insects, bring a sealed stool sample, and get a fecal exam and checkup the same day

AnswerD. Stop wild insects, bring a sealed stool sample, and get a fecal exam and checkup the same day

ExplanationBloody stool, mucus, weight loss, a bloated belly, and a soiled rear end are the classic signs of intestinal parasites in the manual. Wild insects can be intermediate hosts for parasites, so the manual says not to feed them. A 10% weight loss in 10 days exceeds the visit criterion of 5% or more in a week. The correct answer is to stop wild insects, bring a fresh sealed stool sample, and get a fecal exam and checkup the same day. Dismissing bloody stool as insect coloring allows anemia and dehydration to progress. Dog or cat dewormers are the wrong type and dose and risk poisoning. Chilled water lowers body temperature and does not stop bleeding.

IssuesNo fecal exam was done right after acquisition, and wild-caught insects, a high-risk feeding practice for parasite infection, were given. Weight loss was recorded for 10 days, yet the decision to see a vet was delayed.

ImprovementFeed only commercially raised insects; never use wild insects or raw meat. Get a fecal exam right after acquisition and yearly. Set a rule to see a vet when weekly weigh-ins show a loss of 5% or more, and save a photo and sample of any abnormal stool that day.

On an April night, with the room at a fine 24°C, a 3-year-old small opossum is on the cage floor breathing with its mouth open at over 60 breaths per minute. Not only the chest but the belly is heaving, and a little foamy fluid is coming from the nose. It has not touched its food and does not climb the branches. It was normal until yesterday.

What is the most appropriate action in this situation?

1. Assume it is hot, lower the air conditioner to 20°C, and watch
2. Recognize respiratory distress, put it in a quiet warmed carrier, and see a vet immediately
3. Wipe the foam from the nose with a tissue and wait for the morning clinic hours
4. Assume lack of exercise and let it out for free-roam time to move around

AnswerB. Recognize respiratory distress, put it in a quiet warmed carrier, and see a vet immediately

ExplanationAn opossum's normal breathing rate is 20–40 per minute; over 60 with open-mouth breathing, labored breathing using the belly, and foam from the nose are signs of serious respiratory trouble such as pneumonia, pulmonary edema, or a chest abnormality. The manual lists labored or open-mouth breathing as a criterion for an immediate visit. The correct answer is to put it in a quiet warmed carrier and see a vet immediately. Cooling the room when it is already at the proper temperature further weakens a low-temperature opossum. Waiting until morning carries a high risk of respiratory arrest. Free-roam exercise increases oxygen demand and makes it worse. Keep it dark during transport to minimize stimulation.

IssuesThe owner did not know the normal breathing rate (20–40 per minute) and nearly delayed by attributing it to heat or lack of exercise. The rule of seeing a vet immediately for abnormal breathing was not in mind.

ImprovementPost normal breathing and heart rates on the cage, and count the resting breathing rate once a month. Share the criteria for an immediate visit (abnormal breathing, seizures, paralysis, unstoppable bleeding, cold and motionless) with the family and confirm an after-hours vet.

A 4-month-old small opossum, acquired from a breeder one month ago. On the breeder's advice, it has been fed mainly boiled chicken breast and milk. It is clearly smaller than its littermates and its back is hunched. Tonight it slid down partway up a climbing branch and showed a trembling movement on the floor for a few seconds. It cries in distress when touched.

What is the most appropriate action in this situation?

1. Increase the milk to supplement calcium and watch for a month
2. Assume it cannot climb from lack of exercise and add taller climbing branches
3. Rest it warm in a small box, record the diet, and see an exotic-animal hospital the same day
4. Contact the breeder and do nothing until instructed

AnswerC. Rest it warm in a small box, record the diet, and see an exotic-animal hospital the same day

ExplanationA diet centered on meat and milk causes calcium and vitamin D3 deficiency during growth, leading to metabolic bone disease. The curved back, poor growth, falls, and trembling suggest weakened bones and possible neurological signs from low calcium; if it progresses to seizures it becomes an immediate-visit case. The correct answer is to rest it warm in a small box, record the diet, and see a vet the same day. Milk is a prohibited food in the manual, causes diarrhea, and is an unsuitable calcium source. More climbing branches increase the risk of fractures. Waiting for the breeder delays treatment. Also avoid giving calcium on your own; correct the nutrition under a vet's direction.

IssuesThe breeder's incorrect advice was taken at face value, and a diet of milk and meat, prohibited by the manual, was continued during growth. The early sign of being smaller than its littermates was not checked at acquisition, and no initial vet visit had been made.

ImprovementGet a health check at an exotic-animal hospital right after acquisition and have the diet reviewed. Make the staple a complete diet with calcium and vitamin D3, and do not give milk. During growth, record weight and body length weekly and consult early if there is a gap from littermates or the standard.

At midnight, a 2-year-old Virginia opossum suddenly fell on its side on the cage floor, stiffened all four limbs, and began shaking violently all over. It is foaming at the mouth and has lost bladder control. It lasted about a minute and stopped once, but five minutes later the same seizure began again. The family is trying to hold it down and put fingers in its mouth so it does not bite its tongue.

What is the most appropriate first action in this situation?

1. Do not hold it down; clear surrounding objects, keep it dark and quiet, record the time and duration of the seizures, and contact a hospital immediately
2. Put fingers or a towel in its mouth to stop it biting its tongue
3. Pour water on it to stop the seizure
4. Observe for a few hours until the seizures fully stop and see a vet the next day

AnswerA. Do not hold it down; clear surrounding objects, keep it dark and quiet, record the time and duration of the seizures, and contact a hospital immediately

ExplanationSeizures meet the manual's criteria for an immediate visit, and causes are wide-ranging: low calcium, low blood sugar, poisoning, brain disease. The correct answer is not to hold it down, to clear objects it could hit, keep it dark and quiet, record the start time, duration, and number of seizures, and contact a hospital immediately for a visit. Fingers in the mouth get deeply bitten by 50 sharp teeth, and the animal can hurt its teeth and jaw. Water causes aspiration and lowers body temperature. Cluster seizures recurring within five minutes put heavy strain on the brain, and hours of observation is life-threatening. A short video of the seizure helps diagnosis, but do not let filming delay the response. Transport in a dark, warmed carrier.

IssuesThe family did not know how to respond to seizures and attempted dangerous actions such as restraining and putting fingers in the mouth. No after-hours emergency vet had been decided, and seizures were not recognized as an immediate-visit criterion.

ImprovementWrite the seizure procedure (do not restrain, nothing in the mouth, dark and quiet, record the time, contact immediately) on paper and post it. Register two after-hours exotic-animal hospitals. Review the diet's calcium balance and feeding intervals related to blood sugar with the vet.

At night, a 1-year-old small opossum using a metal exercise wheel with gaps got its tail caught in the gap of the wheel while running. On rushing over at its scream, the skin is torn off and bleeding on a 5 cm section from the tail base, and it is thrashing while still tangled in the wheel. The owner panicked and tried to spin the wheel hard to free it.

What is the most appropriate first action in this situation?

1. Spin the wheel backward hard to yank the tail out
2. Pull hard on the tail to free it from the wheel
3. Wait for the opossum to free itself, then disinfect
4. Cover its head with a towel to darken, hold the wheel still, then gently free the tail, press with gauze to stop bleeding, and see a vet the same day

AnswerD. Cover its head with a towel to darken, hold the wheel still, then gently free the tail, press with gauze to stop bleeding, and see a vet the same day

ExplanationThe tail is a grasping organ packed with blood vessels and nerves, and entanglement in a wheel with gaps is a classic example of tail injury and necrosis in the manual. The correct answer is to cover its head with a towel to darken and calm it, hold the wheel so it cannot move, then gently free the tail, press with clean gauze for 3–5 minutes to stop bleeding, and see a vet the same day. Spinning it backward or pulling hard causes degloving injuries where the skin peels off, or bone fractures. Waiting for it to free itself lets it thrash and spread the damage. A degloved tail easily becomes necrotic; check the tip's color and temperature daily for several days. If bleeding will not stop or bone is visible, see a vet immediately.

IssuesA metal wheel with gaps, an unsuitable toy for a long-tailed opossum, was chosen. The wheel's design was not checked, and in the accident the owner panicked and spun it hard, an action that causes secondary injury.

ImprovementUse a large one-piece wheel without gaps, or replace it with climbing branches and hammocks suited to an arboreal animal. Before introducing any toy, inspect it for structures that can trap the tail or feet. Keep gauze and a towel in the first-aid kit and remember the step of darkening to calm the animal.

Thinking it would clean its teeth, the owner gave a 3-year-old Virginia opossum a beef bone. The next night, the right cheek is swollen, and when the mouth is opened, the upper right canine is broken near the base with a red area visible. It drools heavily and drops food as soon as it is put in the mouth. It turns its face away when touched and rubs the right side on the floor.

What is the most appropriate action in this situation?

1. Assume the broken tooth will fall out on its own and watch for a month on soft food
2. Remove the bone, keep up nutrition with softened food, and see a vet the same day
3. Pull the broken tooth out with pliers to relieve the pain
4. Cool the swollen cheek and give human antibiotics

AnswerB. Remove the bone, keep up nutrition with softened food, and see a vet the same day

ExplanationOpossums have 50 teeth that break easily on overly hard bones, which the manual says to avoid. A fracture exposing the red interior of the tooth (the pulp) causes severe pain and bacterial infection, and the swollen cheek is a sign that an abscess is already forming. The correct answer is to remove the bone, keep up nutrition with softened food, and see a vet the same day. Leaving it for a month progresses to jawbone infection and total loss of appetite. Pulling it with pliers leaves the root behind and causes jaw fracture or major bleeding. Human antibiotics are dosed wrong, and it will not heal unless the offending tooth is treated. Facial swelling and dropped food are signs to see a vet.

IssuesOn the assumption it would clean the teeth, a hard bone the manual says to avoid was given. There was insufficient knowledge of the risk of fractures and of oral care for an animal with so many teeth.

ImprovementDo not give hard bones or antlers; manage dental health with a yearly oral exam and weekly checks of breath and gums. Keep treats to small amounts of boiled chicken or insects. Set a rule to see a vet the same day if facial swelling, drooling, or dropped food appears.

In the evening, a family member forgot to close the cage door, and a 2-year-old small opossum that got out into the living room was bitten by the medium-sized dog in the same room. When separated, the opossum was playing dead and motionless, with two puncture holes in its flank oozing blood. There is also a bulging area that feels like air trapped under the skin. The dog is agitated.

What is the most appropriate first action in this situation?

1. Since it is playing dead, return it to a dark nest box until calm and check the wounds a few hours later
2. Squeeze the wounds to push out any dirt and pour disinfectant in
3. Isolate the dog in another room, press the wounds with gauze, put it in a warmed carrier, and see a vet immediately
4. Since there is little bleeding, wash the wounds and watch

AnswerC. Isolate the dog in another room, press the wounds with gauze, put it in a warmed carrier, and see a vet immediately

ExplanationEven when the surface holes of a dog bite are small, muscle and organs may be damaged inside, and bulging under the skin may indicate pneumothorax, subcutaneous emphysema, or internal bleeding. Even if it is playing dead, the injury is serious, and bleeding or wounds with exposed bone meet the criteria for an immediate visit. The correct answer is to first isolate the dog in another room to prevent a second attack, press the wounds with gauze, and see a vet immediately in a warmed carrier. Leaving it for hours because it is playing dead can lead to death from internal bleeding. Squeezing wounds or pouring in disinfectant damages tissue and causes shock. Even with little visible bleeding, dog bites always become infected and involve internal damage, so watching is dangerous.

IssuesThe basic rule of never keeping it in the same room as dogs, cats, or ferrets was not followed, and the cage was in a room with a dog. A simple management error, forgetting to close the door, led directly to a life-threatening accident.

ImprovementKeep the opossum's cage in a room dogs and cats cannot enter, padlock the door, and point-and-check after closing. Isolate the dog in another room during free-roam time. Share with the family that bite wounds are worse than they look, and keep an emergency carrier and hot-water bottle on hand.

At night, while trimming the nails of a 2-year-old Virginia opossum, it struggled and a front claw was cut almost to the base. Red blood drips from the cut and a trail of blood spreads on the floor. The opossum is shaking its foot, spattering blood, and struggling to get back to the cage. The owner, flustered, keeps pressing a tissue on and lifting it off to check.

What is the most appropriate first action in this situation?

1. Keep pressing the claw tip with clean gauze for 3–5 minutes without lifting it to check
2. Keep the foot under running water until the bleeding stops
3. Spray rubbing alcohol on the wound to stop the bleeding
4. Return it to the cage, let the bedding absorb it, and wait for it to stop naturally

AnswerA. Keep pressing the claw tip with clean gauze for 3–5 minutes without lifting it to check

ExplanationThe base of the claw contains blood vessels and nerves, and cutting too short causes continued bleeding. The correct answer is to keep pressing the claw tip with clean gauze for 3–5 minutes; lifting it to check dislodges the forming clot and the bleeding will not stop. The manual also says to press with clean gauze for 3–5 minutes. Running water washes the blood away, prevents clotting, and chills a low-temperature opossum. Alcohol causes severe pain, struggling, and more bleeding. Returning it to the cage risks infection from soiled bedding and continued bleeding from struggling. If it has not stopped after more than 5 minutes of pressure, keep pressing and see a vet. Also see a vet if it limps or the foot swells in the following days.

IssuesNail trimming was forced on a struggling animal during its active hours, and the location of the blood vessel in the claw was not understood. The owner did not know the basics of stopping bleeding (keep pressing without lifting) and kept checking in a panic.

ImprovementTrim nails once or twice a month, tips only, with the animal wrapped in a thick towel in the dark, and have the vet do it if that is not possible. Let the front claws wear naturally on climbing branches. Keep gauze in the first-aid kit and remember not to lift pressure for 3–5 minutes.

On a winter night, to warm a 1-year-old small opossum that seemed unwell, the owner put a hot-water bottle filled with boiling water directly into the nest box without wrapping it in cloth. In the morning it was found sleeping pressed against the bottle; the skin on its belly is red and raw over a wide area, with hair loss and some parts whitish and dry. It screams when touched.

What is the most appropriate first action in this situation?

1. Apply oil to the red areas to prevent drying
2. Rub the raw skin with a clean towel to remove dirt
3. Since it is just hair loss, continue warming and watch
4. Remove the hot-water bottle, cool the area with a wet towel, and see a vet the same day

AnswerD. Remove the hot-water bottle, cool the area with a wet towel, and see a vet the same day

ExplanationWith their low body temperature and low activity, opossums do not move away from a heat source, and an unwrapped hot-water bottle causes low-temperature burns. Widespread red rawness, hair loss, and whitish dry areas indicate damage to the deep layers of skin, and the manual calls for a same-day visit for dark red or blistered skin. The correct answer is to remove the hot-water bottle, cool the area with a wet towel, and see a vet the same day. Oil traps heat and becomes a source of infection. Rubbing with a towel peels off the damaged skin. Continued warming advances the damage, and low-temperature burns spread necrosis over several days. Always wrap the hot-water bottle in cloth for transport and keep it away from the burned area.

IssuesThe decision to warm an unwell animal was correct, but the basics of wrapping the hot-water bottle in cloth and placing it beside the nest box were not followed, and the animal was left pressed against a container of boiling water. It was not checked until morning.

ImprovementAlways wrap the hot-water bottle in thick cloth and place it beside the nest box so the animal can move away on its own. Keep the temperature such that it is not too hot to the touch, and check every few hours. Put a thermometer in the cage and, when warming, create both a warm spot and a place to escape it.

At night, a 2-year-old Virginia opossum on free-roam time was chewing a phone charging cable behind the TV. With a crackling sound it jumped back; the fur around its mouth is scorched and there is a whitish discolored patch on the lip. The cable is still plugged into the outlet, and the opossum is staggering near the cable, breathing with its mouth open.

What is the most appropriate first action in this situation?

1. Immediately pick up the opossum by hand and move it away from the cable
2. Unplug the cable, then check breathing and consciousness, keep it warm, and see a vet immediately
3. Rinse the scorched mouth with water and watch until morning
4. Judge it safe since it is away from the cable and end free-roam time

AnswerB. Unplug the cable, then check breathing and consciousness, keep it warm, and see a vet immediately

ExplanationIn an electric shock accident, the power must be cut first or the rescuer is also shocked. The correct answer is to unplug the cable, then check breathing and consciousness, put it in a warmed carrier, and see a vet immediately. The scorched mouth and white discoloration are electrical burns; the tissue can die and leave a hole days later. Electric shock can also cause cardiac arrhythmia and, hours to a day later, pulmonary edema with fluid in the lungs, and open-mouth breathing may be its onset. Touching it by hand while the cable is live shocks the owner. Rinsing and watching until morning cannot address pulmonary edema or arrhythmia. Even if it can walk now, always get the heart and lungs evaluated the same day.

IssuesCords were not put away before free-roam time, and the dark gap behind the TV was unprotected. In addition to insufficient precautions against its chewing habit, the owner did not know the basic step of cutting the power first in an electric shock.

ImprovementBefore free-roam time, put away all cords or cover them with cord protectors, and block gaps behind furniture. Unplug charging cables not in use. Write the electric shock procedure (cut power, do not touch, check breathing, see a vet immediately) in the emergency notes.

Late at night, during free-roam time, the bathroom door was open and a 1-year-old small opossum fell into the leftover bathwater (25°C). By the time the noise was noticed, it was moving weakly at the surface; when lifted out, its body is soaked and shivering, it is spitting up water, and it is breathing with a wheezing sound. It is conscious but cannot stand.

What is the most appropriate first action in this situation?

1. Hold it upside down by the tail to drain water from the lungs
2. Dry it quickly with hot air from a hair dryer and return it to the cage
3. Towel off the water thoroughly, keep it warm with a cloth-wrapped hot-water bottle, and see a vet immediately
4. Assume it is fine since it spat up the water and let it rest in a dark nest box

AnswerC. Towel off the water thoroughly, keep it warm with a cloth-wrapped hot-water bottle, and see a vet immediately

ExplanationAn opossum that has fallen in water loses body heat rapidly from its wet body, and this is even more dangerous for a low-temperature species. The wheezing sound means water was inhaled into the lungs, which leads to pneumonia or pulmonary edema hours later. The correct answer is to towel off the water thoroughly, keep it warm with a cloth-wrapped hot-water bottle, and see a vet immediately. Holding it upside down by the tail injures the tail bones and spine and does not drain the lungs. Hot air from a hair dryer risks burns and shock from rapid warming. Even after spitting up water, aspiration pneumonia from water left in the lungs cannot be avoided, and abnormal breathing sounds are a criterion for an immediate visit.

IssuesThe bathroom door was left open during free-roam time and there was leftover water in the tub. The owner did not anticipate its habit of entering dark places and water sources, and had not limited the free-roam area.

ImprovementBefore free-roam time, close the bathroom, toilet, and kitchen doors, and drain or cover the bathtub. Limit the free-roam area to one room with a gate and do not take your eyes off it. Keep dry towels and a hot-water bottle on hand and know the warming procedure for a wet animal.

In the morning, after returning a 1-year-old small opossum to its nest box, the owner slammed the cage door and the toes of the right front paw were caught in the door edge. The door was opened right away, but one toe is swollen and purple, with a little blood from the base of the claw. The opossum is holding the paw up, hiding at the back of the nest box, and hisses when touched.

What is the most appropriate action in this situation?

1. Press the bleeding with gauze, rest it warm in a small box, and see a vet the same day
2. Pull the toe to straighten it and tape it to the neighboring toe
3. Hold ice directly on it until the swelling goes down
4. Judge it fine since it is hissing and watch for about 3 days

AnswerA. Press the bleeding with gauze, rest it warm in a small box, and see a vet the same day

ExplanationA swollen, purple toe suggests a fracture or impaired blood flow, and if left can lead to necrosis of the toe. The correct answer is to press the bleeding with gauze, restrict movement in a small box, keep it warm, and see a vet the same day. The manual also says to rest it warm in a small box and see a vet the same day if it limps or swells. An amateur pulling or taping the toe causes bone displacement or cuts off blood flow. Ice applied directly risks frostbite and hypothermia in a low-temperature opossum. Hissing expresses pain and fear, not health, and three days of waiting leads to malunion or necrosis. The front paws are heavily used, so early treatment is important.

IssuesThe basic step of checking the position of the feet and tail before closing the cage door was neglected, and the door was slammed. The owner had not noticed the door design was prone to trapping, and had no accident-prevention measures.

ImprovementAlways visually check the feet and tail before closing the door, and make a habit of closing it slowly. Pad the door edge with cushioning or switch to a cage with a less pinch-prone design. Keep a small transport box and gauze on hand, and share the same-day visit criteria with the family.

At night, hearing squeaking cries from the upper level of the cage, the owner found a 2-year-old small opossum with its left hind leg tangled in a frayed hammock thread, hanging in midair and struggling. The thread is wrapped many times around the ankle, and the foot is swollen purple and cold. The opossum is thrashing in panic and trying to bite.

What is the most appropriate first action in this situation?

1. Pull hard on the thread to break it and free the leg
2. Watch until it frees itself, then observe
3. Take the whole hammock down, lay it on the floor, and wait for the thread to come loose
4. Cover its head with a towel and support its body, cut the threads one at a time with scissors, and see a vet the same day if the foot's color does not return

AnswerD. Cover its head with a towel and support its body, cut the threads one at a time with scissors, and see a vet the same day if the foot's color does not return

ExplanationThread wrapped around the ankle cuts off blood flow; a purple, cold foot means ischemia has already begun, and it will become necrotic if left. The correct answer is to cover its head with a towel to darken, support its body so no weight hangs on the leg, and cut the threads one at a time with scissors to free it. If afterward the foot's color and warmth do not return, the swelling persists, or it does not use the foot, see a vet the same day. Pulling the thread tightens it further around the ankle and cuts skin or tendons. Waiting for it to free itself lets the ischemia progress. Laying the hammock on the floor leaves the thread tight, and in a panic it may thrash and fracture the leg.

IssuesThe hammock was used without inspecting for fraying, overlooking the risk of trapping feet or claws. There was insufficient awareness that claws catch easily on fabric items and that threads can also be swallowed.

ImprovementInspect fabric hammocks and tunnels weekly for fraying and holes, and replace them immediately if frayed. Choose fabrics that do not shed looped threads. Keep blunt-tipped scissors in the first-aid kit and know the entanglement procedure (darken, support, cut one thread at a time).

At night, a 3-year-old Virginia opossum polished off a plate of fried chicken and stir-fried onion the family had left on the table. The amount was about two pieces of fried chicken and three tablespoons of stir-fried onion. It is lively and looks satisfied now, and the owner thinks meat is no problem. The next morning, its urine is a dark reddish-brown, it moves sluggishly, and its breathing is a little fast.

What is the most appropriate action given the situation the next morning?

1. Assume meat is fine for an omnivore and just watch
2. Recognize reddish-brown urine as a sign of anemia from onion poisoning and see a vet the same day
3. Give extra fruit to get fluids into it
4. Give a human digestive aid to help digestion

AnswerB. Recognize reddish-brown urine as a sign of anemia from onion poisoning and see a vet the same day

ExplanationOnion is a prohibited food in the manual; it destroys red blood cells and causes anemia. Poisoning appears from the day after eating onward; reddish-brown urine is a sign that destroyed red blood cells are being excreted, and sluggishness and fast breathing indicate oxygen shortage from anemia. The correct answer is to report what it ate and when, and see a vet the same day. Fatty fried chicken also strains the liver and pancreas. Judging it fine because it is an omnivore is wrong. Fruit is harmful in this state and causes diarrhea. Human digestive aids do nothing for anemia. If breathing gets faster, the gums turn white, or it becomes limp, see a vet immediately.

IssuesLeftover food was left out uncleared, and the owner did not know the danger of onion, a prohibited food, or that poisoning appears from the next day onward. The mistaken belief that meat is no problem missed the chance to consult a hospital right after it ate.

ImprovementAlways clear away human food before letting the opossum out, and post the prohibited foods list where the whole family can read it. If a prohibited food is eaten, consult a hospital the same day even without symptoms. Remember that poisoning symptoms appear hours to a day or more later, and check the color of urine and stool every morning.

At night, a 1-year-old small opossum on free-roam time was chewing the leaves of a pothos placed in the corner of the living room. Leaf fragments are scattered on the floor. Ten minutes later, it is producing large amounts of foamy drool, rubbing its mouth with its front paws, and shaking its head. The amount swallowed is unknown. The nearby animal hospital is closed, and the after-hours hospital is a 30-minute drive.

What is the most appropriate first action in this situation?

1. Put a finger down its throat to make it vomit
2. Remove leaf pieces from the mouth, give a little water as if to rinse the mouth, note the plant name, and contact the after-hours hospital
3. Wipe away the foam and let it rest in a dark nest box until the morning clinic hours
4. Give milk to neutralize the toxin

AnswerB. Remove leaf pieces from the mouth, give a little water as if to rinse the mouth, note the plant name, and contact the after-hours hospital

ExplanationPothos and many other houseplants contain compounds that irritate the mouth's mucous membranes, and heavy drooling and mouth rubbing are signs of oral irritation and swelling. The correct answer is to remove any leaf remaining in the mouth, give a little water as if to rinse the mouth to reduce the irritation, note the plant name and amount eaten, and contact the after-hours hospital for instructions. Inducing vomiting with a finger risks throat injury, aspiration, and bites, and is ineffective. Throat swelling can progress to breathing difficulty, so waiting until morning is dangerous. Milk is a prohibited food and has no neutralizing effect. If breathing looks labored, the mouth stays open, or it becomes limp, see a vet immediately.

IssuesThe manual's basic rule of removing houseplants before free-roam time was not followed, leaving a toxic plant within reach of an animal that puts anything in its mouth. The plant's toxicity had not been researched beforehand, and the after-hours contact was vague.

ImprovementRemove all houseplants from the free-roam room or move them to a separate room out of reach. Look up the names and toxicity of plants in the house and make a list. Put the after-hours hospital contact and the information to report in a poisoning (plant name, amount, time, symptoms) in the emergency notes.

At 10 p.m. on a winter night, a major earthquake (seismic intensity 6) struck. The cage toppled, but a 2-year-old small opossum appears unharmed in its nest box, playing dead and motionless. The power is out and aftershocks continue, and the city has issued an evacuation order. The shelter is a 20-minute walk and the outside temperature is 5°C. On hand are a carrier, towels, a hot-water bottle, a week's supply of food, and a water bottle.

What is the most appropriate evacuation preparation?

1. Since it is playing dead, leave it in the cage and come back to check in the morning
2. Carry the whole cage to the shelter and keep it in the animal area
3. Put it in a pet stroller, go straight into the shelter, and place it with the other animals
4. Move it, nest box and all, into a towel-lined carrier with a cloth-wrapped hot-water bottle, and evacuate with food, water, and hospital information

AnswerD. Move it, nest box and all, into a towel-lined carrier with a cloth-wrapped hot-water bottle, and evacuate with food, water, and hospital information

ExplanationIn a disaster, evacuating together with pets is the rule; a low-temperature opossum left behind in a winter blackout will die of hypothermia. The correct answer is to quietly move the startled, playing-dead animal, nest box and all, into a towel-lined carrier, add a cloth-wrapped hot-water bottle for warmth, and evacuate with food, the water bottle, and hospital information. Walking to the shelter carrying a large cage is unrealistic and risks a fall on the way. At the shelter, sharing space with dogs and cats causes stress and predation risk, so a dark, quiet spot must be secured. Thanatosis resolves within hours, so do not touch it and keep it dark during the move. After evacuating, check breathing and body temperature, and consult a vet if it does not move.

IssuesThe cage was not secured against toppling in an earthquake, and the evacuation procedure and how to transfer it to a carrier had not been decided in advance. The municipality's policy on handling exotic animals at shelters had not been checked.

ImprovementAnchor the cage to the wall and reduce heavy items on the upper level. Pack the carrier, hot-water bottle, a week's food, water, hospital information, and care records in an emergency bag and keep it by the entrance. Check the municipality's shelter pet policy and decide on relatives or a hospital that can take the animal.

In July, after the rainy season, the owner runs a dehumidifier and the air conditioner all day to prevent mold. The hygrometer beside the cage reads 28% and the room temperature is 25°C. For several days, a 1-year-old small opossum's tail from the base to the tip has looked white and powdery, fine cracks have appeared on the ear edges, and it scratches frequently at night. Appetite and stool are normal.

What is the most appropriate action in this situation?

1. Stop the dehumidifier, humidify back to 50–60%, record the tail and ear condition daily, and see a vet if it worsens
2. Apply human skin toner to the tail and ears to moisturize
3. Mist water directly into the cage with a spray bottle to raise humidity
4. Assume it is mold rather than a skin problem and dehumidify even more

AnswerA. Stop the dehumidifier, humidify back to 50–60%, record the tail and ear condition daily, and see a vet if it worsens

ExplanationThe manual states that opossums need 50–60% humidity and that dry air chaps the tail and ears. 28% is clearly too dry, and the powdery tail, cracked ears, and itching are its early symptoms. The correct answer is to stop the dehumidifier, humidify back to 50–60%, record the tail and ear condition daily, and see a vet within a few days if the cracks deepen, bleed, or hair loss spreads. Human skin toner irritates with alcohol and fragrance and is licked and ingested. Misting directly wets and chills the body and dampens the bedding into a breeding ground for mold and bacteria. More dehumidifying worsens the symptoms.

IssuesMold prevention was prioritized and dehumidifying continued without checking the opossum's proper humidity. The owner looked at the hygrometer without understanding what the number meant, delaying the response to the early sign of tail changes.

ImprovementCheck the hygrometer beside the cage daily and adjust with a humidifier or dehumidifier whenever it leaves 50–60%. Prevent mold by changing bedding every 2–3 days and ventilating. Check the tail, ears, and feet for dryness weekly, and use a vet-recommended moisturizer if dryness persists.

At midday in August, a lightning strike caused a power outage and the air conditioner stopped. Within an hour the room temperature passed 29°C and looks set to rise further. A 3-year-old Virginia opossum has left its nest box and is stretched out on the floor, breathing somewhat fast but with its mouth still closed. There are two frozen water bottles in the freezer, and ice packs, a battery-powered fan, and wet towels are available.

What is the most appropriate first action in this situation?

1. Put ice packs directly inside the nest box pressed against the body to cool it
2. Place a cloth-wrapped frozen water bottle in the cage, move it to a cool north-facing room, circulate air with the battery fan, and monitor the temperature
3. Fill the bathtub with water and immerse the opossum
4. Assume the power will be back soon and just wait

AnswerB. Place a cloth-wrapped frozen water bottle in the cage, move it to a cool north-facing room, circulate air with the battery fan, and monitor the temperature

ExplanationThe manual says to keep summer temperatures under 28°C and to provide a frozen water bottle. Fast breathing with the mouth still closed is the stage before heatstroke, and acting now can prevent it. The correct answer is to place a cloth-wrapped frozen water bottle in the cage, move it to a cool room such as one facing north, circulate air with the battery fan, and keep monitoring with a thermometer. Ice packs pressed directly on the body cause frostbite and rapid cooling that makes it ill, and it may chew and swallow them. Immersing in water is dangerous for a low-temperature opossum and causes panic and drowning. Just waiting for power lets the room pass 30°C, and once open-mouth breathing starts it becomes an immediate-visit situation.

IssuesPreparation of cooling measures for a summer blackout was inadequate, and it took an hour to notice the temperature rise. A frozen water bottle was not routinely kept in the cage, and no cool room to move to during a blackout had been decided.

ImprovementIn summer, always keep at least two frozen water bottles ready and place one in the cage during the day. Decide on a cool room to move to in a blackout and a cool place reachable by car (a relative's home or hospital). Put a battery fan and thermometer in the emergency kit and remember to see a vet immediately once open-mouth breathing appears.

The owner has a deep cut on a finger but has been changing the urine-damp bedding of a 2-year-old opossum every day without gloves. A week later, the owner has a 38.5°C fever, severe headache, muscle pain, and the eyes look yellowish. The opossum is healthy with no symptoms. Urine tends to pool at the bottom of the cage, and no absorbent pad was used.

What is the most appropriate action in this situation?

1. Assume it is unrelated since the opossum has no symptoms and watch with over-the-counter cold medicine
2. Assume giving up the opossum removes the source of infection and look for a new home for it
3. The owner sees a doctor and mentions keeping an opossum and contact with its bedding, and leaves bedding changes to another family member wearing gloves
4. Give the opossum human antibiotics to eliminate the bacteria

AnswerC. The owner sees a doctor and mentions keeping an opossum and contact with its bedding, and leaves bedding changes to another family member wearing gloves

ExplanationLeptospirosis is a zoonosis listed in the manual, transmitted through skin wounds by contact with urine-contaminated water or bedding. Fever, headache, muscle pain, and jaundice are typical symptoms, and severe cases lead to kidney or liver failure. The correct answer is for the owner to see a doctor, mention keeping an opossum and handling bedding with a wounded hand, and during treatment leave bedding changes to another family member wearing gloves. Animals often carry it without symptoms, so the opossum being healthy does not rule it out. Cold medicine will not cure it and delays diagnosis. Giving up the animal does not address the root cause and burdens the animal. Human antibiotics cannot be given without a vet's judgment.

IssuesThe basic rules of avoiding care when you have a skin wound and changing bedding with gloves were not followed. Despite the high urine output, no absorbent pad was used, and the unsanitary pooling of urine raised the infection risk.

ImprovementAlways wear gloves to change bedding, and leave it to another family member when you have a hand wound. Line the cage bottom with an absorbent pad and change bedding every 2–3 days. Wash hands with soap after care, and make it a habit to tell the doctor about the pet if a family member falls ill.

Thinking it must be lonely, the owner put a newly acquired 1-year-old opossum in the same cage as a 2-year-old small opossum. The newcomer has had no quarantine or testing. Three days later, the resident has several bite wounds on its back, one of which is infected and swollen. The newcomer has soft stool, and the resident's stool has also been loose since today. Both have reduced appetite.

What is the most appropriate action in this situation?

1. Immediately separate them into different cages and rooms, and see a vet the same day for treatment of the infected wound and fecal exams for both
2. Assume they will get along once used to each other and keep them together
3. Assume the fighting will stop with a bigger cage and more hiding places
4. Apply human antibiotic ointment to the resident's wounds and keep them together

AnswerA. Immediately separate them into different cages and rooms, and see a vet the same day for treatment of the infected wound and fecal exams for both

ExplanationOpossums are solitary, and the manual says to keep one per enclosure in captivity. Cohabitation causes bite wounds with bacterial infection and abscesses, and contact with an unquarantined animal spreads parasites and infections such as salmonella. Soft stool and reduced appetite in both suggest infection has spread. The correct answer is to immediately separate them into different cages and rooms and see a vet the same day for treatment of the infected wound and fecal exams for both. They cannot be expected to get used to each other, and the wounds will multiply. Space and hiding places do not change their solitary nature. Human ointment is harmful when licked, and an abscess needs lancing and appropriate antibiotics. After separating, do not share cages or tools, and care for the healthy animal first.

IssuesThe owner did not understand the species' solitary nature and housed them together based on human feelings. The quarantine period and fecal and parasite tests for the new animal were skipped, leaving no defense against introducing infection.

ImprovementKeep opossums one per cage, and never house them together even when keeping several. Quarantine a new animal in a separate room for two weeks and get fecal and parasite exams before placing it in the same room. Use separate food bowls and cleaning tools for each animal, and care for the healthy one first.

Late at night, a 2-year-old small opossum cut the inside of its hind leg deeply on a torn section of the cage's wire mesh. Pressure was applied with gauze for 5 minutes, but each time it is released, bright red blood spurts out. The second piece of gauze is also soaked red, and the opossum's gums are turning pale. The after-hours hospital is a 25-minute drive and a family member can drive.

What is the most appropriate action in this situation?

1. Tie a cord tightly around the top of the leg to stop the blood and watch until morning
2. Since it will not stop, stop pressing, wash the wound with water, and then see a vet
3. Keep pressing at home until the bleeding stops, then see a vet
4. Layer fresh gauze on top and keep pressing while transporting it immediately in a warmed carrier

AnswerD. Layer fresh gauze on top and keep pressing while transporting it immediately in a warmed carrier

ExplanationBright red blood that keeps spurting is arterial bleeding, and pale gums indicate the onset of anemia and shock. The manual says that if bleeding does not stop, keep pressing and transport. The correct answer is to leave the soaked gauze in place, layer fresh gauze on top, keep pressing, and transport it immediately in a warmed carrier. A tourniquet tied with a cord causes tissue necrosis, and leaving it until morning means death from blood loss. Stopping pressure to wash the wound flushes out the clot and increases bleeding. Waiting at home delays transport, and small species have no margin for blood loss. Phone the hospital with your arrival time during transport, and keep pressing while the family member drives.

IssuesThe hazard of torn wire mesh was missed during cage inspection. The owner did not know the next step when bleeding does not stop within 5 minutes (keep pressing and transport) and nearly decided to wait at home for it to stop.

ImprovementInspect the cage mesh, door, and toys weekly for tears or sharp parts. Stock plenty of gauze in the first-aid kit and remember: press for 3–5 minutes, and if it does not stop, transport while maintaining pressure. Decide the after-hours hospital contact and who drives as a family.

At night, a 4-year-old, 4 kg Virginia opossum suddenly collapsed during free-roam time, stretched out and went limp. There is no foul smell, and chest movement appears to have stopped. No heartbeat can be felt with a hand on the chest, and the gums are pale blue. No breathing is observed over 10 seconds. A family member is phoning the after-hours hospital. The drive is 15 minutes.

What is the most appropriate action in this situation?

1. Wait a few hours in a dark place since it is most likely playing dead
2. Compress the chest with one hand at over 100 per minute, breathing into the nose every 5 compressions, and head to the hospital
3. Gently squeeze the chest between thumb and index finger
4. Strike the back hard to stimulate it and wake it up

AnswerB. Compress the chest with one hand at over 100 per minute, breathing into the nose every 5 compressions, and head to the hospital

ExplanationThanatosis occurs right after a scare, comes with a foul smell, and breathing and heartbeat are maintained. No smell, no breathing, no heartbeat, and pale blue gums is cardiopulmonary arrest, so begin resuscitation. The correct answer is the manual's method for large species: compress the chest with one hand at over 100 per minute, give one breath into the nose every 5 compressions, and head to the hospital. Waiting hours loses the chance to save it. The thumb-and-finger squeeze is for small species and provides too little pressure for a 4 kg animal. Striking the back does not restore the heartbeat and damages organs. Continue resuscitation in the car while a family member drives, and tell the hospital your arrival time. Always see a vet to identify the cause and manage recovery.

IssuesThe owner had not prepared for a sudden collapse in a 4-year-old senior animal by learning large-species CPR or how to distinguish it from playing dead. Roles for nighttime transport and resuscitation were not assigned, and the response nearly stalled waiting on the phone.

ImprovementWrite the CPR methods on paper and post them: one hand at over 100 per minute for large species, finger squeeze for small species. Share how to distinguish thanatosis (smell, breathing, heartbeat, body temperature) with the family. Assign nighttime roles for driving, resuscitation, and contact, and have senior animals' heart and lungs checked at twice-yearly exams.

At 11 p.m. on a Saturday, a 3-year-old small opossum has not eaten or drunk tonight, but it comes out of the nest box, walks a little, and its breathing is calm. Meanwhile, a friend's 2-year-old Virginia opossum has been breathing fast with its mouth open since evening and its hind legs do not move. The after-hours hospital is an hour's drive, and neither animal has been seen there before.

What is the most appropriate decision about an after-hours emergency visit?

1. Since after-hours visits are expensive, keep both warm and wait until Monday's clinic hours
2. The small opossum goes to the emergency hospital immediately because it is not eating; the friend's animal can wait until tomorrow
3. The friend's animal goes to the emergency hospital immediately for abnormal breathing and hind-leg paralysis; the small opossum is kept warm and seen within the next day
4. Film both, ask other keepers on social media, and wait for replies

AnswerC. The friend's animal goes to the emergency hospital immediately for abnormal breathing and hind-leg paralysis; the small opossum is kept warm and seen within the next day

ExplanationIn the manual's triage, labored or open-mouth breathing and hind-leg paralysis are immediate-visit criteria, while not eating or drinking is a same-day criterion. The correct answer is to take the friend's animal to the emergency hospital immediately, and keep the small opossum that is not eating warm and see a vet within the next day. However, small species tolerate fasting poorly, so switch to an immediate visit if by morning it becomes limp, its body turns cold, or its breathing changes. Waiting until Monday is fatal for an animal with respiratory trouble, and cost must not be the reason. Consulting on social media wastes time and carries no responsibility. Phone the after-hours hospital before leaving and bring weight, diet, heating setup, and a photo of the stool.

IssuesThe owner did not know the triage categories (immediate / same day / within a few days) and tried to decide based on cost and distance rather than severity. No after-hours exotic-animal hospital had been researched in advance, creating a situation of a first visit an hour away.

ImprovementPost the immediate-visit criteria (cold and motionless, abnormal breathing, seizures, paralysis, unstoppable bleeding) and same-day criteria (not eating, discoloration, diarrhea over half a day) on the cage. Register two exotic-animal hospitals, one for weekdays and one for after hours, and complete an initial visit in advance.