Rabbit coccidiosis: a common intestinal parasite that flies under the radar
Few owners have heard of coccidiosis before it hits their own rabbit, even though it ranks among the most common parasitic conditions in the species. A study by Pilarczyk, Tomza-Marciniak, Pilarczyk, Januś, Stanek, Seremak and Sablik, published in 2020 in Veterinary World, measured the extent and intensity of Eimeria infection by age, sex and breed in farmed rabbits, confirming that young animals remain by far the most affected (study on Google Scholar). Our rabbit health guides are gathered in the rabbit care and grooming section.
Two very different forms
Rabbit coccidiosis comes in two distinct forms caused by different Eimeria species. The intestinal form, by far the more common, causes diarrhoea, bloating and stunted growth in young rabbits, often resolving well if treated early. The hepatic form, rarer but more severe, affects the liver and can cause marked lethargy, a severe loss of appetite and, left untreated, a serious outcome.
Why young rabbits are the most vulnerable
A kit's still-immature immune system largely explains this heightened sensitivity, confirmed by the study, which found a much higher prevalence in recently weaned animals than in adults. A pet rabbit adopted young, especially within the first weeks after weaning, deserves closer monitoring of its digestion and a first vet check that includes a stool exam.
Limiting transmission day to day
Oocysts spread by the faecal-oral route, often through litter or hay soiled by droppings. Regular litter cleaning, hay stored away from the tray, and a few weeks of quarantine for any newcomer before introducing it to a resident rabbit meaningfully cut the risk of cross-contamination. Diarrhoea that doesn't improve quickly deserves a stool exam rather than a wait-and-see approach; our guide on rabbit diarrhoea and the signs that should worry you covers the other possible causes to rule out.
- Two forms: intestinal (common, often mild) and hepatic (rare, more severe).
- At-risk group: recently weaned young rabbits, far more than adults.
- Transmission: faecal-oral route via soiled litter or hay.
- Useful habit: a stool exam at the first vet visit for a newly adopted young rabbit.
Anticoccidial treatment prescribed by a vet, paired with thorough cleaning of the environment, usually resolves the episode without lasting effects in a rabbit treated early.
Frequently asked questions
Can an adult rabbit catch coccidiosis?
Yes, but its already-established immunity usually limits how severe the symptoms get compared with a young animal.
Can coccidiosis spread to humans?
No, the Eimeria species affecting rabbits are specific to the species and carry no known zoonotic risk.
Can diet prevent coccidiosis?
Clean hay and rigorous litter hygiene remain the most effective levers; no single food protects against infection on its own.
This guide is part of Planète Pets’s Rabbits universe. Our advice is general in nature: for any health concern, your veterinarian remains the only reference.