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Why is my older dog's mouth black with blisters and rapid decline?

Updated On September 23rd, 2025

Pet's info: Dog | Pomeranian | Male | unneutered | 15 lbs

What causes a older dog to have black lips with blood blisters black gums and black teeth resulting in death in 3 days

1 Answer

Most Helpful Answer

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Answered By Daniel Fonza, DVM

Veterinarian

Published on May 12th, 2018

Hi there and thank you for using Petco Pet Education Center, formerly Petcoach to address your question. There could several causes of this. I would suspect a toxin that was ingested or a systemic disease that is causing abnormal bleeding into the surrounding tissues of the body. It is difficult to say for sure just based on these clinical signs. If you have any other questions or concerns please feel free to contact me and I would be more than happy to help you further.

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