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Why is my dog throwing up and pooping black? Is it serious?

Updated on September 23rd, 2025

Pet's info: Dog | Mixed Breed Small (up to 22lb) | Female | 7 months and 22 days old | 6.614 lbs

My dog poop is black and she’s vomitiing excessively. What should i do?

2 Answers

Most Helpful Answer

Answered By Shaneez Wallani, DVM

Veterinarian

Published on October 19th, 2018

Black stool could indicate blood in the stool. Vomiting, and black stool could be caused by parasites, change in diet, toxin ingestion, infectious viral diseases, blockage in the intestines caused by ingestion of a foreign body, or a mass/growth in the gastrointestinal tract. In the case of an unspayed female dog , pyometra (a potentially fatal infection of the uterus) is a possibility as well, and this is very concerning. Please have Cassie seen by a veterinarian as soon as possible, as vomiting and possible blood in the stool can lead to dehydration and anemia, and can be very dangerous if left untreated. I recommend taking in a fecal sample from Cassie to your vet as well, as that may aid them in making a diagnosis. Good luck, and I hope she feels better soon!

1Pet Parents found this answer helpful

Related Answers from Veterinarians

Answered By Dr. Elizabeth
Veterinarian
Published on December 16th, 2018
That sounds serious. I recommend to take Shelby into the veterinarian right away. Black stool can indicate bleeding in the upper GI system. There are many causes: parasites, liver disease, severe inflammatory bowel disease, pancreatitis, cancer, or a severe GI ulcer. The doctor will need to run bloodwork and a fecal sample to look for parasites. There are also additional diagnostics that they may recommend. Medications are indicated and likely a bland diet. I hope this helps to point you in the right direction. Best of luck.
1Pet Parents found this answer helpful

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