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Why is my new puppy having diarrhea after his recent vaccinations?

Updated On September 23rd, 2025

Pet's info: Dog | Golden Retriever | Male | unneutered | 1 month and 28 days old | 10 lbs

Our puppy has had diarrhea for about 12 hours now pretty consistently. I’ve been giving him plenty of water (he won’t drink it as often as I would like). We don’t know why because there hasn’t been a change in food but we did just get him a few days ago but his stool was normal the first day. He also had vaccinations within the last 4 days

1 Answer

Most Helpful Answer

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Answered By Andrea M. Brodie, DVM

Veterinarian

Published on October 18th, 2018

If your puppy has not been wormed yet, this is the time. Intestinal parasites would be the main cause of diarrhea. Also, if you have been feeding him a different puppy food from what his breeder fed, there could be an indiscretion that is giving him diarrhea. Unfortunately there is always a chance of your puppy suffering from a viral disease such as parvo, especially since he had not had the foull course of vaccinations. If the diarrhea does not subside by tomorrow, or if Bear gets lethargic or starts to vomit, you need to take him back to your veterinarian for an exam.

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