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Why is my new puppy's poop bloody and runny? What should I do?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Large (61lb +) | Male | unneutered | 3 lbs

i just bought a puppy from someone and his poop is really runny and has blood in it . What should i do? What would be the cause

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2 Answers

Most Helpful Answer

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Answered By Jennifer Summerfield, DVM CPDT-KA

Veterinarian, Certified Dog Trainer

Published on April 6th, 2019

Poor pup! The most common cause of runny stool with blood in a young puppy would be intestinal parasites. I would recommend taking a fecal sample to your veterinarian to have it checked. They can prescribe an appropriate dewormer or other medication to treat the problem depending on what is found.

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    Answered By Jennifer Summerfield, DVM CPDT-KA

    Veterinarian, Certified Dog Trainer

    Published on December 19th, 2016

    Poor pup! The most common cause of runny poop with blood in a puppy this age would be intestinal parasites such as hookworms or coccidia, but it could also be due to a more serious problem such as parvo. If he is acting normal, it should be okay to wait until morning and take him to your regular vet. If he is acting lethargic, vomiting, or not wanting to eat, I would recommend taking him to an emergency vet tonight since it may not be safe to wait until morning.

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