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Why is my unvaccinated puppy vomiting and skinny after deworming?

Updated On September 23rd, 2025

Pet's info: Dog | Pit Bull Terrier | Male | 1 year and 1 month old | 14 lbs

My husband brought home a 14 week old pitbull puppy 2 weeks ago. We were just told he hasn't had his parvo shots so we got his first one yesterday. He looked skinny a few days ago so I gave him round worm medicine 3 days ago. Last night he started throwing up and he has do this all day. My husband found the worms in his stool today dead. But this puppy looks skinny and gas vomited non stop all day including 10minutes ago. His vomits is clear with lil white foam. He drinks a bit of water.

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1 Answer

Most Helpful Answer

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Answered By Jenny, DVM

Veterinarian

Published on February 11th, 2018

I would be worried about parvo with those symptoms or a bacterial infection. If it is parvo, he was exposed and incubating the virus before the vaccine so it was not protective. The best thing to do is feed boiled chicken and rice and try to keep him hydrated with pedialyte or Gatorade. I would try to find an ER clinic or a vet that takes after hours calls to get him seen today for a test and further treatment

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