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My 9-week-old puppies have diarrhea and vomiting. What could it be?

Updated On September 23rd, 2025

Pet's info: Dog | American Pit Bull Terrier | Male | unneutered | 1 month and 19 days old | 10 lbs

I've got 2 9 week old pups who are utd on vaccinations that have diarrhea and vomiting. The stools aren't bloody. What could it be?

4 Answers

Most Helpful Answer

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Answered By Vanessa Yeager DVM MPH

Veterinarian

Published on October 17th, 2017

Hi there and thanks for posting! It is not uncommon for 9 week old pups to have intestinal parasites causing these symptoms. Giardia, Coccidia, and roundworms could be possibilities. Parvovirus is also another possibility for puppies. Your veterinarian can easily test for all of these. I hope this helps and best of luck!

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Other Answers

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    Answered By Dr. Melanie, BVSc MS

    Veterinarian

    Published on November 5th, 2016

    Poor Loki! If he isn't fully vaccinated, I would be concerned that he may have parvovirus. Parvo is a life threatening infection that causes vomiting, diarrhea, anorexia, and lethargy. His symptoms could also be caused by a severe GI illness, eating something rotten, or a foreign body. Given his young age and the chance it could be parvo, I would take Loki into a vet immediately. There is no cure for parvo; rather, it requires intensive symptomatic care in a vet clinic, so he should be seen right away to start treatment in case he does have parvo.

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    Answered By Dr. Melanie, BVSc MS

    Veterinarian

    Published on May 1st, 2019

    At nine weeks of age, Duke will not be fully vaccinated. It takes three rounds of vaccine each given four weeks apart to be fully vaccinated. Given that a dog isn't old enough to get vaccines until 6-8 weeks of age, the earliest a dog is fully vaccinated is 14-16 weeks of age. I'm very concerned that he is vomiting, have diarrhea, and not eating. My first thought is parvo. He should see a vet immediately, please take him into one now.

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    Answered By Dr. Melanie, BVSc MS

    Veterinarian

    Published on January 20th, 2019

    Patches could have parvovirus if he isn't vaccinated, a severe GI illness, a foreign body, may have eaten something rotten, or could have pancreatitis. It's extremely serious that he can't even keep down water, and he has to see a vet immediately as this is a medical emergency. 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. Best of luck.

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