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My kitten has diarrhea for weeks, acts normal, food changes didn't help?

Updated on September 23rd, 2025

Pet's info: Cat | American Shorthair | Male | neutered | 9 months and 18 days old | 10 lbs

My 9 mo/old kitten has suddenly been experiencing bouts of diarrhea for several weeks. He will have a normal bm and then the next will be diarrhea. Acts normal. His diet consisted of primarily Sheba 3x day and he would occasionally graze on my other 2 cats dry UTI kibble. I thought maybe it was the wet food so I let him mainly eat the Iams dry but that didn’t stop it. Switching foods hasn’t stopped it. He isn’t overeating. Goes outside in his catio but is on Revolution so I know it’s not worms..

1 Answer

Most Helpful Answer

Penelope Graben, DVM

Answered By Penelope Graben, DVM

Veterinarian

Published on May 19th, 2021

Hi there,

Sorry to hear about Cricket's inconsistent stools. There are a couple of things that come to mind with this problem in a young cat. I'm glad to hear he is on Revolution, that does eliminate almost all parasites. Coccidia and Giardia are two types of parasites that would need a different medication for treatment, so parasites aren't totally off the list.
Some cats have food allergies that will lead to occasional vomit or diarrhea when exposed to a certain protein, and some cats will have irritable bowel disease that responds best to a prescription GI diet. I'd recommend talking to your vet about Cricket's specific case and what their diagnostic recommendations are for him.

I hope this helps. Thanks for using Petco Pet Education Center, formerly Petcoach.
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