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Why is my pet's poop black and tarry? Is it normal or serious?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Female | spayed | 1 year and 7 months old | 13 lbs

Is black feces normal?

1 Answer

Most Helpful Answer

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Answered By Linda G, MS, DVM

Veterinarian

Published on August 29th, 2017

Hello, thank you for using Petco Pet Education Center, formerly Petcoach. If your pet is feeling very well, eating & drinking normally, then an occasional dark stool may be normal. Stool can be temporarily colored by dyes in food & treats, plant material & some medications. If this is an ongoing occurrence, then I would have Lexi checked out, just to make sure. A stool that is very dark & has a tarry appearance could be an indication of blood. Take care.

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