Diarrhea in rabbits: when to worry and what to do
In rabbits, true diarrhea — liquid, formless droppings, sometimes soiling the hindquarters — is always a veterinary emergency, unlike a simple excess of soft, uneaten cecotropes. A study by Meredith, Prebble and Shaw, published in 2017 in the Journal of Small Animal Practice, found that a low-hay diet clearly raises the risk of digestive upset and uneaten cecotropes in rabbits (study on Google Scholar). Find all our health pointers in rabbit care and grooming.
Diarrhea or uneaten cecotropes: how to tell them apart?
Uneaten cecotropes form soft, clumped masses, often visible stuck to the fur under the tail, while true diarrhea is liquid, foul-smelling and uncontrolled. This distinction matters: the first calls for reviewing the diet, the second requires an emergency visit, especially in a young kit or an older rabbit, both more vulnerable to dehydration.
What are the most common causes?
A sudden diet change, too much fruit or water-rich vegetables, an imbalance in the cecal flora after an unsuitable antibiotic treatment, or a parasitic infection are among the most frequent causes. In a young kit, diarrhea shortly after weaning is particularly serious and calls for prompt care.
What should you do while waiting for the vet?
Leave quality hay and fresh water available at all times, temporarily remove fresh fruit and vegetables, and monitor the animal's appetite and activity level. Never give a human medication or an unprescribed treatment: some antibiotics, including several penicillins, are dangerous for rabbits and can worsen the digestive imbalance, as detailed in our guide to antibiotics dangerous for rabbits.
- Liquid or absent droppings: never to be confused with simple soft cecotropes, see an exotics vet without delay.
- A listless rabbit that stops eating: an absolute emergency, also see the warning signs of GI stasis.
- Diarrhea in a young kit: risk of rapid dehydration, a visit is essential within hours.
- Frequent recurrence: a sign to thoroughly review the hay, pellet and treat ration.
To avoid being caught off guard by a digestive emergency, it helps to know the cost of an exotics consultation in advance: our guide to the annual rabbit vet budget helps you prepare.
Frequently asked questions
Can diarrhea be fatal in rabbits?
Yes, especially in a young kit or an older rabbit: the resulting dehydration can progress very quickly, which is why a vet visit is urgent.
Should a rabbit be fasted during diarrhea?
No, unlike a dog or cat, a rabbit should never be fasted: hay must stay available at all times.
Can a change in pellets cause diarrhea?
Yes, any diet change should happen gradually over one to two weeks to give the cecal flora time to adapt.
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.