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Why is my dog lethargic, not eating, losing weight, and has dark diarrhea?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Small (up to 22lb) | Female | unspayed | 5 lbs

Dog had rapid weight loss. won't eat. drinks a lot, won't hardly move, dark liquid stool

2 Answers

Most Helpful Answer

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Answered By Robin Diers, DVM

Veterinarian

Published on July 26th, 2017

Hello there. Storm sounds like she is very sick. Some issues that might be causing her sickness are diabetes, kidney disease, or certain types of cancer. I recommend taking her to the veterinarian as soon as possible. She will need bloodwork and might also need x-rays to determine the cause of her sickness. She might need to be hospitalized as well. Good luck!

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Other Answers

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    Answered By Cara, DVM, cVMA

    Veterinarian

    Published on

    You should take Storm to your veterinarian. They will likely want to take x-rays and blood work to figure out what is going on with her. Given that she is not spayed, a uterine infection called a pyometra is possible, as are gastrointestinal problems such as an obstruction.

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