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Why is my 3-month-old puppy pooping black after recent shots?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Male | 3 months and 17 days old | 5 lbs

Yesterday my dog had a black stool . And today a little black and yellow stool . He is 3 months old . And now when he was sleeping .. my palm was on his stomach . I felt something. He got his vanguard vaccine 5 days before and rabies vaccine 2 days before

1 Answer

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on April 19th, 2019

It sounds like Jax has blood in his stool, and if it's black, that means the blood is coming from his upper GI tract. This isn't normal, and I would take him into a vet now for a health check. Best of luck.

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