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My 3-month-old puppy is vomiting and has black poop. What's wrong?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Female | unspayed | 5 lbs

approx 3 months old, vomiting 10+ times per day, snotty/slimey w/ food vomit, hard black poop,drawed up and skinny. vet treated her for hookworms. she improved 1 day now back at it

1 Answer

Most Helpful Answer

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Answered By David Elbeze, DVM, MRCVS

Veterinarian

Published on January 5th, 2018

It sounds as Roxy is suffering from a gastrointestinal condition, possibly an infection. it could also be due to ingestion of a foreign body material. i would recommend taking her to the vet the first chance you get, she will need to be checked first, if the vet thinks it's a simple gastrointestinal infection she will need an anti vomiting injection, antibiotics and a special food for a few days in order to get better. if the vet thinks it is more serious she will need a blood test and possibly an ultrasound in order to find out what is wrong.

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