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Why is my dog pooping blood with vomiting, diarrhea, and no appetite?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Male | neutered | 1 year and 2 months old

My dog start pooping blood. He experience vomiting, diarrhea, & lost of appetite. I observe when he poop blood maybe after 3 days.

2 Answers

Most Helpful Answer

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Answered By Lauren Barry, BVSc, MRCVS, DVM

Veterinarian

Published on June 5th, 2017

Poor Sniper, he's probably feeling pretty unwell. Blood in the feces can be a serious concern and there are several possible causes: it can be from a change of food/ treats or scraps that didn't agree with him. It could be a bacterial or viral infection such as Parvo, it could be from damage inside the guts from bones or eating something that got stuck. Also some parasites can cause this. After 3 days, I am concerned that it's not resolving, please take him to your vet as soon as you can. They will need to perform some tests such as examining his feces to try and determine why he is unwell. How he feels better soon!

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Other Answers

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    Answered By Jenna Beyer, DVM, MBA, cVMA

    Veterinarian, Certified Veterinary Acupuncturist

    Published on April 8th, 2020

    Possible causes for this include dietary intolerance or indiscretion, food allergy, intestinal parasites, GI blockage, gastroenteritis, bacterial or viral infection (such as parvo if John wasn't properly vaccinated), among others. You can try a dewormer, pet probiotics, and bland diet (boiled chicken breast and cooked white rice), and make sure to get plenty of fluids into him. You might also want to call your local vet to see if they can help over the phone.

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