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My kitten has blood in her poop after changing food. What's wrong?

Updated On September 23rd, 2025

Pet's info: Cat | American Shorthair | Female | 2 lbs

My kitten has blood mixed with her poop. I’ve read many articles that say the cause of her bleeding could be dietary changes. I really hope this is the case because I have changed their diet recently to canned food. Because of what I read I transitioned them back to dry food. This morning is the first time I’m aware of that she has had blood in her stool. It’s a bright red mixed in and she seems to have trouble keeping her tail up while she uses the potty as well. Any help is appreciated!

2 Answers

Most Helpful Answer

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Answered By Ricardo Fernandez, DVM

Veterinarian, Veterinary Oncology Resident

Published on June 25th, 2018

Thanks for using Petco Pet Education Center, formerly Petcoach! The change is diet is very likely the cause though other things like parasites cannot be ruled out. Blood in the stool is an indication to have her evaluated by a veterinarian. If this continues to be an issue in the next 24-48 hours, have her evaluated by a veterinarian for further assessment and treatment. Hopefully she will improve on her own. Good luck and have a great day!

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    Answered By Dr. Melanie, BVSc MS

    Veterinarian

    Published on January 7th, 2018

    The change in the diet could be the reason behind him having blood in his feces. Cats can very sensitive to diet changes, and they should be changed slowly if that is done. I would keep an eye on his feces and if it's still bloody, then take him into the vet for a health check to be safe. In the meantime, I would feed him a bland diet of boiled white meat chicken (no bones) in small amounts several times a day for a couple of days. Then slowly add back in his old food. Good luck, I hope this helps!

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