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Why is my old dog lethargic, not eating, and passing bloody stool?

Updated On September 23rd, 2025

Pet's info: Dog | Irish Water Spaniel | Male | unneutered | 10 years old

My dog as lost weight won't eat dog food passing blood diarreha lythargic as good days and bad days he is a ten yr old irish water spaniel

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1 Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on May 21st, 2017

Oh no, poor Ozzy! It's very serous that he has lost weight, won't eat dog food, and is passing bloody diarrhea in addition to being lethargic. In a senior dog, I would be very concerned he could be suffering from cancer, kidney or liver disease, or hemorrhagic gastroenteritis among other causes. Ozzy really needs to see a vet as soon as possible as he sounds quite sick, and I feel his symptoms are severe enough to warrant a trip to the vet now. Please take him into an ER vet clinic; if there isn't one in your area, there will be a vet on call for emergencies. The information to reach that vet is found on a clinic's answering machine or website.

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