The 10 common rabbit diseases every owner should know are GI stasis, malocclusion, pasteurellosis (snuffles), pododermatitis (sore hocks), myxomatosis, rabbit hemorrhagic disease (RHDV), encephalitozoonosis (E. cuniculi), coccidiosis, ear mites (psoroptic mange), and uterine adenocarcinoma in unspayed does. Most are manageable when caught early, but three — GI stasis, RHDV, and myxomatosis — can kill within 24 to 72 hours of the first visible sign. Rabbits hide illness as a prey-species instinct, so by the time symptoms appear, a condition is often already advanced. The single most useful skill is recognizing the earliest deviation from your rabbit's normal eating, drinking, and droppings.
Why Rabbits Hide Illness: The Prey-Species Mechanism
A rabbit in the wild that limps or stops eating becomes a target. Natural selection favored individuals that maintained normal behavior until they were physically unable to do so. That evolutionary pressure produced a species that masks pain and illness for as long as possible.
The physiological cost is a narrow window for intervention. A rabbit's gastrointestinal tract is in near-continuous motion, and it depends on that motion to stay healthy. The cecum, a fermentation chamber holding roughly 40 percent of the total gut volume, hosts a bacterial population that dies if transit slows. When a rabbit stops eating for 12 to 24 hours, gas and toxin buildup begin. By 24 to 48 hours, dehydration and hepatic lipidosis can set in.
In plain terms: a rabbit that has not eaten in 12 hours is not "having a fussy day." It is a candidate for an emergency.
A second mechanism matters just as much. Rabbits are obligate nasal breathers, meaning they cannot comfortably switch to mouth breathing. Any upper respiratory congestion, which pasteurellosis produces readily, compromises oxygen intake far faster than the same congestion would in a dog or cat.
The 10 Diseases at a Glance
| Disease | Primary cause | Typical first sign | Contagious to other rabbits | Rough mortality without treatment |
|---|---|---|---|---|
| GI stasis | Motility failure, low fiber | No droppings, no appetite | No | 25 to 50 percent |
| Malocclusion | Overgrown incisors/molars | Drooling, dropped food | No (often genetic) | Low, but chronic |
| Pasteurellosis | Bordetella/Pasteurella bacteria | Nasal discharge, sneezing | Yes | 30 to 50 percent in acute cases |
| Sore hocks | Pressure on wire or hard floors | Reluctance to hop, bare soles | No | Low with early care |
| Myxomatosis | Myxoma virus, mosquito/ flea spread | Swollen eyelids, facial swelling | Yes (vector-borne) | 90 percent and higher |
| RHDV (RHDV1/RHDV2) | Calicivirus | Sudden death, fever | Yes (direct and indirect) | 70 to 90 percent |
| E. cuniculi | Encephalitozoon cuniculi, a microsporidian | Head tilt, hind-limb weakness | Yes (spore shedding in urine) | Varies; neurologic damage often permanent |
| Coccidiosis | Eimeria protozoa | Diarrhea, weight loss in young rabbits | Yes (oocyst contamination) | Up to 30 percent in weanlings |
| Ear mites | Psoroptes cuniculi | Head shaking, crusty ear canals | Yes (direct contact) | Low, but painful |
| Uterine adenocarcinoma | Hormonal, intact does | Bloody urine, palpable mass | No | High once metastatic |
The mortality figures above refer to untreated or late-treated disease. With supportive care, several of these conditions have survival rates above 80 percent.
GI Stasis and Dental Disease: The Two Most Common Domestic Problems
Gastrointestinal stasis and malocclusion are the two conditions a house rabbit is most likely to develop, and they are linked. Rabbit teeth grow continuously at roughly 2 to 3 millimeters per week. A diet low in abrasive fiber fails to wear molars down, so they overgrow and form sharp points that cut the tongue and cheeks. The resulting pain reduces chewing, chewing reduction slows gut motility, and the cycle tightens into stasis.
The fiber threshold matters. A healthy adult rabbit needs a grass-hay-based diet with hay making up about 70 to 80 percent of intake. Pellets should be limited to roughly one-quarter cup per 5 pounds of body weight per day for an adult. Rabbits fed unlimited pellets and few vegetables develop both dental and motility problems at measurably higher rates.
Signs of stasis include a sudden drop in droppings, small or misshapen droppings, no eating for 12 hours, a hunched posture, and teeth grinding. The teeth grinding, called bruxism, is a pain behavior and a red flag on its own.
Respiratory and Bacterial Infections: Pasteurellosis and Its Look-Alikes
Pasteurellosis, commonly called snuffles, is the umbrella term for upper respiratory infection in rabbits, most often caused by Pasteurella multocida and Bordetella bronchiseptica. The bacteria colonize the nasal passages and can spread to the middle ear, the lungs, and the reproductive tract.
The core mechanism is the nasal-breathing constraint described earlier. A rabbit with even partial nasal blockage has to work harder for each breath than a similarly congested dog would. White nasal discharge, matted fur on the inner front paws from wiping, and a persistent sneeze are the classic signs.
A non-obvious detail: many rabbits carry Pasteurella asymptomatically. Estimates put carrier rates in healthy pet rabbits at 30 to 50 percent. A stressful event, such as a move, a new pet, or a temperature swing, can trigger an outbreak in a carrier. This is why an owner may see "sudden" snuffles with no obvious exposure.
Treatment typically involves antibiotics chosen after culture, since Pasteurella isolates vary in resistance. Recovery takes 2 to 4 weeks, and relapse is common.
Viral Threats: Myxomatosis and Rabbit Hemorrhagic Disease
Myxomatosis and RHDV are the two viral diseases that most often end a rabbit's life quickly, and they work differently.
Myxomatosis is spread by biting insects, mainly mosquitoes and fleas, and by direct contact. The virus replicates in the skin and mucous membranes, producing the swollen eyelids, genital swelling, and facial edema that give the disease its distinctive look. In unvaccinated rabbits, mortality often exceeds 90 percent. The virus does not survive long outside a host, so insect control and indoor housing are meaningful preventive measures.
RHDV, caused by a calicivirus, attacks the liver and causes massive hepatic necrosis. RHDV1 kills roughly 70 to 90 percent of infected adult rabbits. RHDV2, a variant that emerged more recently in many regions, also affects young rabbits, which RHDV1 largely spared. Death can occur within 12 to 36 hours of infection, often with no warning signs beyond a fever that owners miss. The virus is remarkably stable in the environment and can persist on contaminated surfaces and in water for weeks to months.
Vaccination status is the single largest determinant of survival for both diseases. Availability and legal status vary by country, so owners should confirm with a rabbit-savvy veterinarian.
The Timeline of a Rabbit Health Emergency
| Time since first sign | GI stasis | Pasteurellosis | Myxomatosis | RHDV |
|---|---|---|---|---|
| 0 to 6 hours | Reduced droppings | Sneezing, clear discharge | Mild eye redness | Often none |
| 6 to 12 hours | No droppings, no appetite | White discharge begins | Eyelid swelling starts | Fever, lethargy |
| 12 to 24 hours | Hunched posture, pain | Matted paws, noisy breathing | Facial swelling visible | Sudden death possible |
| 24 to 48 hours | Dehydration, toxin buildup | Weight loss, possible pneumonia | Genital swelling, anorexia | Death in most untreated cases |
| 48 to 72 hours | High risk of death | Chronic form possible | High risk of death | Most survivors were vaccinated |
| 3 to 7 days | Recovery if treated early | Slow recovery on antibiotics | Rare recovery | Recovery is uncommon |
The rows do not map to identical biology across diseases, but they show how little slack most rabbit emergencies allow. A single day of delay changes outcomes in the first four conditions.
Edge Cases and Variations: Age, Breed, and Sex
Age changes the risk profile more than breed does. Coccidiosis is largely a disease of weanlings between 4 and 12 weeks; adults are usually resistant. E. cuniculi is more likely to produce neurologic signs in rabbits older than 2 years. Uterine adenocarcinoma appears almost exclusively in intact does, and its incidence rises steeply after age 2, reaching an estimated 50 to 80 percent by age 4 to 5 in some breeds.
Breed matters for two diseases. Sore hocks (pododermatitis) is far more common in heavy breeds such as Flemish Giants and Rex, whose body weight concentrates pressure on the hock. Rex rabbits also have thinner fur on the soles. Malocclusion has a strong genetic component in dwarf breeds, where the skull shape predisposes to incisor misalignment.
Sex matters almost exclusively for uterine adenocarcinoma. Spaying before age 1 reduces the risk dramatically, and this is the single most clear-cut preventive decision in rabbit medicine.
In plain terms: a 5-year-old intact female dwarf rabbit carries a different risk set than a 6-month-old neutered male of the same breed.
Common Misconceptions
The first misconception is that a rabbit who is eating is fine. Rabbits eat through early illness. The more sensitive indicator is the droppings: a sudden drop in quantity, size, or consistency, or a change from round to teardrop-shaped, precedes most GI emergencies by hours.
A second misconception is that rabbits only need a vet when visibly sick. Annual wellness exams catch malocclusion, ear mites, and early molar points before they become painful.
A third misconception is that Pasteurella is always curable. The carrier state persists in many rabbits, so treatment manages flare-ups rather than eliminating the organism.
A fourth is that pet-store rabbits are low-risk for RHDV. The virus does not distinguish between pedigree and pet-store animals, and unvaccinated rabbits are vulnerable regardless of origin.
What to Actually Do: Practical Prevention and Response
- Feed a hay-first diet. Grass hay at 70 to 80 percent of intake, limited pellets, and daily leafy greens. This alone reduces GI stasis and malocclusion risk more than any other single measure.
- Weigh your rabbit weekly. A 5 percent weight loss over 2 weeks is a trigger for a vet visit, even without symptoms.
- Track droppings daily. Report any 12-hour gap in droppings or a change in size and shape the same day.
- Control insects and limit outdoor exposure to reduce myxomatosis risk. Indoor housing with screens cuts mosquito exposure sharply.
- Confirm vaccination status for RHDV and myxomatosis with a rabbit-savvy veterinarian, since availability differs by region.
- Spay females before age 1 to reduce uterine adenocarcinoma risk.
Red flags that warrant same-day veterinary care are always a bulleted list:
- No droppings for 12 hours or more.
- No eating or drinking for 12 hours.
- Labored or noisy breathing, or open-mouth breathing.
- Head tilt, circling, or hind-limb weakness.
- Bloody urine in an unspayed female.
- Facial swelling or swollen eyelids.
Limitations and What Remains Uncertain
Rabbit medicine is younger than dog and cat medicine, and several numbers cited here rest on smaller studies. Carrier rates for Pasteurella vary widely between populations and are not precisely known. Mortality figures for myxomatosis depend heavily on the strain and on whether the rabbit was vaccinated, so a single number understates the range. RHDV2 behavior has shifted as it spread across regions, and vaccination protocols are still being adjusted in some countries. E. cuniculi treatment reduces shedding and slows neurologic damage but does not reliably reverse existing deficits, and the long-term outcome for a rabbit with head tilt depends on how much permanent nervous tissue damage occurred before treatment began. Owners should treat any single figure here as a starting estimate and confirm current guidance with a veterinarian who treats rabbits regularly, because a rabbit-specific exam remains the most reliable diagnostic tool available.