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Why is my 3-month-old kitten still having diarrhea after food change?

Updated On September 23rd, 2025

Pet's info: Cat | American Shorthair | Female | spayed | 3 months and 20 days old

My kitten has been having diarrhea since I got her on Saturday today is Monday she is three months but still so petite I set up her litter box and she had diarrhea right away so then I set up her food and water she eats and drinks it seemed her poop started taking a firmer shape the I ran out of one cat food and gave her a completely different flavored canned food and her diarrhea just hasn't stop running no matter what I give her she still has appetite and drinks I'm just so worried

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1 Answer

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Answered By Kevin Sanada, DVM

Veterinarian

Published on August 21st, 2017

Diet is just one cause of diarrhea, but kittens often acquire infections that can give them long-standing diarrhea. Infections like giardia, coccidiosis, tritrichomonas, campylobacter and salmonella could be potential causes. The only way to know for sure is to have her feces tested at a veterinary office. They will often prescribe antibiotics that kill most of these bugs. The vast majority of times we can get the diarrhea under control and/or find the cause, so it's worth the visit. The vet will also be able to see if Georgia has any other health problems and help keep her healthy. In the meantime, you can try to add some probiotics (sold at the pet store) to the food and see if that helps. Make sure she has plenty of clean water also. I hope that helps and Georgia gets better soon.

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