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Why is my dog pooping blood, vomiting, and so weak? Is it Parvo?

Updated On September 23rd, 2025

Pet's info: Dog | Yorkshire Terrier | Male | neutered | 5 years and 9 months old | 10 lbs

My dog has been sick for two days. I thought an upset stomach. He's not eating & is now pooping straight blood. I gave him pumpkin for his stomach but threw it up. Today his regurgitation was a deep yellow. Might this be Parvo? I've kept the dogs seperate. He's only getting a bit of water now. He's weak, sad, & just pitiful. How can I help him be more comfortable?

1 Answer

Most Helpful Answer

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Answered By Ricardo Fernandez, DVM

Veterinarian, Veterinary Oncology Resident

Published on January 15th, 2018

Thanks for using Petco Pet Education Center, formerly Petcoach! The clinical signs you describe are concerning as they can be seen with serious gastrointestinal infections such as Parvovirus. However, other possibilities include are gastroenteritis due to other reasons, hemorrhagic gastroenteritis, intestinal worms and dietary indiscretion, among other possibilities. The sooner these conditions are treated the better the outcome tends to be. For this reason, I recommend that you have Prince evaluated by a veterinarian as soon as possible to check for these possibilities and to start therapy based on findings. At the very least they can address dehydration if present and start him on medications to make him feel better. I am worried that he has been declining rapidly and needs veterinary treatment. Good luck! Keeping my fingers crossed for your boy!

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