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My cat has bloody stool after food change & on meds. Is a vet needed?

Updated on September 23rd, 2025

Pet's info: Cat | Domestic Shorthair | Female | spayed | 4 years and 10 months old | 11 lbs

I switched to a different dry cat food a week ago and my cat won’t touch it. The first day I found some vomited out. So I switched to wet food. Today she pooped outside her litter box. It is only the 2nd time this has ever happened and it looks like there is some blood in her stool. Do I need to bring her to the vet? She is also on furosemide and clopidogrel. Thank you

1 Answer

Most Helpful Answer

Dr. Elizabeth

Answered By Dr. Elizabeth

Veterinarian

Published on May 28th, 2019

Yes, Sansa needs to see her veterinarian today. Blood can be present in the stool for many reasons including the change in food but the clopidogrel is an anticoagulant so you need to be certain that the platelet levels are not being affected and causing internal bleeding. This is a very rare and uncommon side effect but it's best to be safe. The doctor will likely check her platelet levels and likely some other diagnostics. Make sure to bring in a sample of the stool in case the doctor needs to check for parasites or bacterial overgrowth (which is very common). Sansa will likely receive medications to help her to feel better quickly. Best of luck.
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