Rabbit Coccidiosis: Liver and Intestinal Signs to Watch

Coccidiosis in rabbits is caused by single-celled Eimeria parasites that damage either the liver (hepatic form) or the intestinal lining (intestinal form), producing diarrhea, weight loss, and — in the hepatic form — a bloated abdomen. Young and immunocompromised rabbits are most vulnerable, and prompt treatment significantly improves outcomes.

Last reviewed: June 2026

What Is Rabbit Coccidiosis?

Rabbit coccidiosis is an infection by Eimeria species protozoa that parasitize either the intestinal lining or the bile ducts of the liver. The intestinal form is most common and produces diarrhea, while the hepatic form — caused specifically by Eimeria stiedae — infects the liver's bile duct epithelium and can be life-threatening even before diarrhea appears. Transmission occurs when rabbits ingest oocysts (infective eggs) shed in feces — through contaminated feed, water, bedding, or direct contact with droppings. Rabbits under six months of age, recently weaned kits, and immunocompromised adults are at highest risk. As described in Quesenberry & Carpenter's Ferrets, Rabbits & Rodents: Clinical Medicine and Surgery, subclinical infection is common in adult rabbits, but crowded conditions, stress, or concurrent illness can trigger clinical disease even in older animals.

Liver and Intestinal Signs to Watch

The signs of coccidiosis depend on which form is present, and both can occur simultaneously in the same rabbit.

Intestinal coccidiosis signs:

• Soft, watery, or mucus-streaked diarrhea — sometimes with blood
• Straining or urgency to defecate
• Wet fur around the hindquarters
• Reduced appetite and weight loss
• Lethargy and hunched posture
• In severe cases, rectal prolapse

Hepatic coccidiosis signs:

• Enlarged, firm, or visibly distended abdomen
• Jaundice — yellowing of the eyes, gums, or pale skin areas
• Progressive weight loss and muscle wasting despite reasonable appetite early on
• Lethargy that worsens over days to weeks
• Loss of appetite in advanced cases

Signs of severe or advanced disease in either form:

• Marked weight loss — ribs and spine become easily palpable
• Dehydration — sunken eyes, dry mouth, skin that tents when gently pinched
• Complete anorexia
• Weakness and collapse in terminal cases

Young rabbits can deteriorate rapidly — a kit that looks mildly unwell one day may be critically ill by the next (AEMV Pet Care Guides, 2024).

Diagnosis and Treatment

Diagnosis is confirmed by fecal flotation identifying Eimeria oocysts. For hepatic coccidiosis, abdominal palpation and ultrasound may reveal liver enlargement, and bloodwork may show elevated liver enzymes (ALT, ALP, bilirubin). Multiple fecal samples may be needed, as oocyst shedding is intermittent.

Treatment:

• Trimethoprim-sulfamethoxazole (TMP-SMZ) is the most commonly used antiparasitic in pet rabbits, given orally for 7–14 days
• Ponazuril is an increasingly preferred option due to higher efficacy against some Eimeria species, as described in Quesenberry & Carpenter's Ferrets, Rabbits & Rodents
• Supportive care — oral or subcutaneous fluids for dehydrated animals, assisted feeding for anorexic rabbits, and pain management if the abdomen is distended
• Environmental decontamination — removing all soiled bedding, disinfecting the hutch or enclosure with diluted bleach or ammonia (not safe around animals until fully dried and ventilated), and preventing fecal contamination of food and water sources

Prognosis is good for mild to moderate intestinal coccidiosis caught early. Severe hepatic coccidiosis carries a more guarded prognosis, particularly if jaundice or liver failure has developed.

When to See a Vet

Call your vet today if:

• Your rabbit has soft or watery diarrhea lasting more than 24 hours
• You notice a visibly enlarged or distended abdomen
• Your rabbit is losing weight despite eating
• A young rabbit or kit appears lethargic, hunched, or has wet fur around the hindquarters
• Multiple rabbits in the same enclosure are showing digestive symptoms

Go to the ER immediately if:

• Your rabbit has stopped eating entirely and is completely inactive
• You notice yellowing of the eyes or gums (jaundice)
• Your rabbit is collapsing, unable to stand, or unresponsive
• There is blood in the diarrhea and your rabbit is severely weak

Frequently Asked Questions

What are the first signs of coccidiosis in a rabbit? The earliest signs vary by form: intestinal coccidiosis typically starts with soft or runny droppings, a slightly hunched posture, and reduced food interest. Hepatic coccidiosis may begin more silently — gradual weight loss, mild lethargy, and a slowly enlarging abdomen before other symptoms appear. In young kits, deterioration can happen within hours, making early detection critical.

Can rabbits recover from coccidiosis without treatment? Healthy adult rabbits may carry low-level Eimeria infections subclinically, but clinical disease — especially in kits or immunocompromised adults — rarely resolves without antiparasitic treatment. Delaying care in a rabbit showing diarrhea or weight loss risks rapid progression to severe dehydration and liver damage. Veterinary treatment is strongly recommended for any rabbit showing signs.

How is rabbit coccidiosis treated at home versus at a vet? Home care alone is not appropriate for clinical coccidiosis. Antiparasitic medications like ponazuril or TMP-SMZ require a veterinary prescription in most regions. A vet visit also ensures correct diagnosis — several other conditions mimic coccidiosis. You can support recovery at home by keeping the enclosure clean, ensuring fresh water, and following your vet's medication schedule precisely.

How much does treating coccidiosis in a rabbit cost? An exotic vet consultation typically runs $75–180. Fecal flotation testing adds $30–60, and bloodwork for suspected hepatic involvement costs $100–250. Medications (ponazuril or TMP-SMZ) are $20–60 per course. Severely affected rabbits needing subcutaneous fluids or hospitalization can cost $300–800 or more. Exotic vet fees run roughly 1.5–2× standard practice rates for the same procedures.

How do I prevent coccidiosis in my rabbit? Keep the enclosure scrupulously clean — remove droppings daily, fully replace bedding weekly, and prevent fecal contamination of food and water bowls. Quarantine new rabbits for at least 30 days before housing with established animals. During quarantine, collect a fecal sample for a vet to check. Reduce stress, which can convert subclinical infection to clinical disease, by providing adequate space, enrichment, and stable temperatures.

Still Not Sure if Your Rabbit Needs a Vet?

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