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My dog has a mass, breathing problems, vomiting, and dark slimy stool.

Updated on September 23, 2025

Pet's info: Dog | Pomeranian | Female | unspayed | 10 years and 11 months old | 9 lbs

My dog is having these symptoms Fatigue Dark slimy stool, looks yellowish when touched but looks black on her bum Incontenance Looks like she having breathing problems Throwing up Fish smelling urine We noticed a large mass under her belly near her private’s

1 Answer

Most Helpful Answer

Ricardo Fernandez, DVM

Answered By Ricardo Fernandez, DVM

Veterinarian, Veterinary Oncology Resident

Published on November 17, 2018

Thanks for using Petco Pet Education Center, formerly Petcoach! It does appear that Diamond has several issues. Diarrhea and vomiting could be due to something like gastroenteritis for example. The breathing issues could be due to a lot of factors such as pneumonia or heart disease, among other possibilities. The mass may be benign or malignant. I highly recommend that you have her evaluated by a veterinarian who can start by performing a physical examination on her and taking it from there. Good luck!
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