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My dog is weak, vomiting, and has black stool. Is it liver or kidney?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Male | 9 years old | 55 lbs

Dog vomited after 5/6 days undigested food after giving anemia (somewhat black stool was released) and dose of silymarin & bulcazine syrup .. drinking lots of water eating nearly nothing, weak .. are these symptoms of liver or kidney disease? .....was given too many antibiotic tablets & injections... a month and half back with 5 shots of post rabies injections

1 Answer

Most Helpful Answer

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Answered By Lauren Jones VMD

Veterinarian

Published on March 16th, 2017

My main concerns for Buddy at this time are the lethargy, excessive drinking and black stool. Lethargy and increased water consumption can certainly be associated with liver or kidney disease, but also with diabetes, Cushing's disease, sign of anemia (low red blood cell count), etc. Black stool is indicative of digested blood, typically from the stomach or small intestines and may be caused by an ulcer. These signs are all highly concerning and should be addressed by your vet ASAP!

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