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My dog's stool is purple-brown after a new supplement. Is this normal?

Updated On September 23rd, 2025

Pet's info: Dog | Labrador Retriever | Male | neutered | 8 years and 11 months old | 55 lbs

Hi, recent two days I notice there is a change in my dog stool Colour. From the normal brown to abit purple brown. The only thing had change is his supplement 3 days back. And I'm. It sure it cause the change in stool Colour or his not well

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1 Answer

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on April 27th, 2017

I see a bit of the purple brown color in his feces, and given that Sam is on a new supplement, it is possible that's the culprit of the color change. Without knowing what supplement he is on, I can't say this for certain so having him seen by a vet for a health check would be best to be safe. I would bring a sample in of his feces for the vet to examine as well.

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