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My new puppy has bloody, black, tarry poop. What should I do?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Small (up to 22lb) | Male | unneutered | 2 months and 19 days old | 5 lbs

We just bought a puppy and he seems to have bloody tarry poop.

1 Answer

Most Helpful Answer

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Answered By Ricardo Fernandez, DVM

Veterinarian, Veterinary Oncology Resident

Published on November 26th, 2017

Thanks for using Petco Pet Education Center, formerly Petcoach! I highly recommend that you have Nico evaluated by a veterinarian as soon as possible for further assessment and treatment. Black tarry stools can be observed with upper gastrointestinal ulceration and bleeding. Things like parvovirus, gastrointestinal ulcers or parasites, among other possibilities can cause that. Good luck!

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