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Why is my new puppy's poop liquid after shots, worming, or travel?

Updated on September 23rd, 2025

Pet's info: Dog | Mixed Breed | Male | unneutered | 3 months and 2 days old | 7 lbs

I recently got a new puppy. He has his first shots and has been wormed. He road in the car a bit. His poop has been like liquid since yesterday. We feed him blue Buffalo food.

1 Answer

Most Helpful Answer

David Darvishian

Answered By David Darvishian

Veterinarian

Published on August 1st, 2017

Hi and thanks for using Petco Pet Education Center, formerly Petcoach! Sorry Bear is having problems. Worming puppies properly involves multiple doses to clear out as many of the parasites as possible. The wormers kill the adult worms but then over a 2-3 week period, the immature stages can migrate into the gut again, so repeated treatments are needed. So worms may be causing this problem or many other things including a food change (too rapid), dietary indiscretion (eating things he is not supposed to eat), foreign bodies, infections, etc. It's best to have your vet evaluate Bear again and decide what tests or treatment that he may need to help clear up the problem. I hope he gets better soon.
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