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My dog won't eat and has bright red diarrhea. What should I do?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Female | spayed | 42 lbs

I have a mixed breed female dog, she refused her food tonight then she had bright red diarrihea

1 Answer

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on March 8th, 2017

On no, poor Ayla! Bright red diarrhea indicates she is bleeding from her lower intestinal tract, and that can be caused by toxin ingestion, eating something rotten, a foreign body, trauma to the GI tract, hemorrhagic gastroenteritis, or even cancer. It's considered serious when a dog has bloody diarrhea, and it's best to have her checked out by a vet right away for it especially since she isn't eating as well. The vet can diagnose what is causing her bloody diarrhea and anorexia, and can treat her for it.

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