Common Rabbit Health Issues and Why You Need the Right Vet

Before anything else on this list: rabbits need a rabbit-savvy exotic vet, not a standard small-animal clinic. Find one before you need one, ideally through a rabbit rescue or the House Rabbit Society, since a vet unfamiliar with rabbit-specific physiology can genuinely miss or mishandle the conditions below.

GI Stasis: The Most Common Emergency

This is the single most important condition to understand. A rabbit's gut can slow down or stop entirely, allowing gas to build up, and it's genuinely life-threatening if not caught quickly.

Watch for: not eating, few or no droppings, a hunched posture, teeth grinding, and a visibly bloated abdomen.

A rabbit that hasn't eaten or passed stool in 8 to 12 hours is an emergency, not a wait-and-see situation. Past eight hours it is abnormal and worth a vet, and at twelve it is an emergency outright, so treat eight as when you pick up the phone. GI stasis is often secondary to something else, dental pain, stress, or another underlying illness, which is why a rabbit having a stasis episode usually needs a full workup, not just symptomatic treatment. The rabbit GI stasis guide goes through the causes and the treatment in full.

Dental Disease

Rabbit teeth grow about 1 cm a month, as much as 4 to 5 inches a year, and an incisor that does not meet its partner can grow 1 mm a day. Overgrowth or molar spurs cause real problems: drooling or a permanently damp chin, dropping food while trying to eat, weight loss, pawing at the mouth, trouble grooming, and mouth sores or abscesses. A diet short of fiber is a main cause, and heredity adds to it, with dwarf and lop-eared breeds overrepresented. The roots and back teeth cannot be seen from the front, so a vet confirms it with skull X-rays. Treatment is trimming the teeth under anesthesia with rotary tools, repeated every 4 to 12 weeks for the rest of the rabbit's life, and in severe cases extraction. The best prevention is a properly hay-based diet, which wears teeth down naturally the way pellets alone don't. Our guide on why rabbits need unlimited hay explains how fast those teeth actually grow and what the grinding action of long-strand fiber prevents.

At home, check that the top incisors meet the bottom pair cleanly, with the top just in front. Watch the rabbit eat a piece of hay, which it should take and grind steadily rather than pick up and drop. Never trim a rabbit's teeth yourself. Nail clippers and wire cutters fracture the tooth, which leads to abscesses in the tooth or gum.

Flystrike

Flies lay eggs on soiled or damp fur, most often around the rear, and the eggs hatch into maggots within hours. The maggots can do extensive damage in a day and can kill a rabbit within 24 to 48 hours, so this is a genuine emergency. It is most common in warm weather but can happen all year. The rabbits at risk are the ones that cannot keep their rear end clean: a rabbit with diarrhea, tooth pain, arthritis, or obesity, one living in a dirty enclosure, or one with an open wound. Rabbits kept outdoors are a particular risk, as is any rabbit with urine-soaked fur that is not caught and cleaned promptly.

Fly eggs or any maggot in the fur, even a single one, mean an emergency vet appointment right away. Other signs are patches of wet fur and fur loss around the rear, lethargy, eating less, a bad smell, and collapse. Do not treat the rabbit at home. The vet clips the fur, cleans the skin, and removes the maggots, often under anesthesia, then gives pain relief and medication for the rest. In severe cases the damage is too great to save the rabbit.

Prevention is routine. Look at the rear end, fur, and skin every day, and more often in warm weather. Remove soiled litter and wet bedding every day. Keep the rabbit slim and moving so it can groom itself, have any wound checked, and have the vet look for the hidden cause, since dental pain and arthritis both stop a rabbit grooming. In summer, ask the vet about a fly deterrent.

Respiratory Infection ("Snuffles")

Often caused by Pasteurella multocida, a bacterium most adult rabbits carry without trouble, though other bacteria do the same job. Stress, poor ventilation, or ammonia from a dirty enclosure lets it take hold. Watch for a thin discharge from the nose and eyes that thickens over time, sneezing, wheezing or noisy breathing, loss of appetite, lethargy, and crusty, matted fur on the insides of the front paws, from a rabbit wiping its own nose repeatedly. It is contagious between rabbits, so call the vet promptly. Open-mouth breathing is an emergency at any hour.

A vet should confirm it with a bacterial culture and a sensitivity test rather than treating on the signs alone, because not every strain causes disease and only some antibiotics are safe for a rabbit. Pneumonia cases rise with the ammonia level in the enclosure, so fixing the ventilation and cleaning schedule matters alongside the medication.

Uterine Cancer

A significant risk in unspayed females. In some strains, 80% of unspayed does develop uterine adenocarcinoma by 3 years of age, and the cancer is the main reason vets spay a doe that will not be bred. Spay early, before it becomes a concern rather than after.

A Few Other Conditions Worth Knowing

• E. cuniculi, a parasite carried by many pet rabbits, often with no signs. When it becomes active it can cause head tilt and contributes to recurrent GI stasis episodes. A head tilt can also come from an inner ear infection, and telling the two apart is the vet's job. Vets often test for it at the first exam, and when the test shows an active infection the treatment is a 28-day course of fenbendazole, started before signs appear.
• Sore hocks (pododermatitis), pressure sores on the undersides of the hind feet, from wire or hard flooring or inadequate bedding, and made more likely by obesity. It starts as fur loss, red skin, and swelling, then becomes ulcers and open sores, and untreated it reaches the bone. Treatment is anti-inflammatory medication, foot wraps, and a flooring change, which is another reason flooring choice matters.
• Bladder sludge or stones, caused by too much calcium in the diet, for instance from alfalfa fed to an adult, or from a lot of kale, spinach, or dandelion greens. Signs are decreased appetite, lethargy, weight loss, teeth grinding, and frequent urination, and stones are removed surgically. Grass hay for non-breeding adults is the prevention.
• Antibiotic-triggered enterotoxemia, when a penicillin-family drug or clindamycin wipes out a rabbit's gut bacteria and lets toxin-producing Clostridium take over, often killing within 48 hours of the first signs. The drug list to raise before any prescription is in the small mammal enterotoxemia guide.

Spay and Neuter: Timing

Rabbits reach sexual maturity at about 3.5 to 4 months in small breeds, 4 to 4.5 months in medium breeds, and 6 to 9 months in giants. A vet sexes a rabbit by gently pressing the genital area to show a slit-like opening in a female or the penis in a male, and a buck's testicles descend at 10 to 12 weeks, so ask for the sex to be confirmed at the first exam. Opposite-sex rabbits will breed unless both are altered. Neutering a male has no health benefit, but it is worth doing for behavior: an intact buck is in constant libido, mounts other pets and objects, and may be aggressive toward other rabbits. For a doe, a simple ovariectomy is possible in a rabbit under a year old, and the usual time is at maturity, around 6 months, before fat builds up around the uterus. Both rabbits in a pair are neutered, which also makes litter training work and chewing settle.

Choosing a Healthy Rabbit and the First Vet Visit

A healthy rabbit has clean, shiny fur with no bald patches or wounds. Wet or matted fur under the chin or around the tail can signal illness. The eyes and nose are clear, the ears are clean and not crusty, and the rabbit is alert, curious, and moves without stiffness or limping. Visit in the early morning or the evening, when rabbits are most active, and look at the place as well as the animal: ask what it has been eating and how it has been handled. Larger rabbits are often calmer and sturdier, and smaller ones more delicate. Selling or giving away baby rabbits under 2 months old is illegal in many states.

Book the first vet visit for the first week. For a rabbit from a rescue, ask when it was last vaccinated. The exam covers weight, body condition, and the mouth: a full dental exam of the back teeth takes sedation, so a rabbit that is eating normally may not need one. Ask about an E. cuniculi test and the vaccine schedule below. A newcomer that will share space with a rabbit already at home waits two weeks in a separate space after its vaccination before they share air or bedding.

RHDV2 and the Vaccine Schedule

Rabbit hemorrhagic disease virus 2 reached the United States in 2018 and has since spread through wild and pet rabbits nationwide. It kills fast: in a vaccine trial, 18 of 19 unvaccinated rabbits exposed to it died within 10 days. The virus travels on food, water and anything else it contaminates, so an indoor rabbit is not out of reach.

The US vaccine can be given from 4 weeks of age:

• First dose, then a second dose 21 days later.
• Protection is full about two weeks after the second dose.
• An annual booster keeps it there. Vaccinated rabbits in a duration study held protective antibody levels for a full 12 months, and a booster at that point raised them sharply.

Side effects are usually limited to a mild fever, some lethargy, or a small swelling where the needle went in. Pairing the yearly booster with one of the twice-yearly wellness exams keeps it from slipping.

When to See a Vet, Immediately

• No food or droppings for 8 to 12 hours, calling at eight rather than waiting for twelve
• A bloated or tense abdomen
• Visible fly eggs or maggots in fur
• Open-mouth breathing or persistent discharge
• Sudden lethargy or hiding

For anything less urgent, a twice-yearly wellness exam with a rabbit-experienced vet catches most of the above well before it becomes an emergency.

Sources & Further Reading

Printable Guide

A sick rabbit is no time to be scrolling. The Rabbit Care Package puts these red flags, a symptom quick reference and an emergency card on paper, in a 50-page PDF, $8.99.

Read the first 5 pages free