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Why is my puppy throwing up and not eating after his 6-week shot?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Male | unneutered | 1 month and 14 days old | 3.5 lbs

I gave my puppy his 6 weeks shot. He now won't eat and he keeps throwing up. What could be wrong?

2 Answers

Most Helpful Answer

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Answered By Ann Dion, DVM

Veterinarian

Published on May 13th, 2017

Hello. I am sorry tat Blizzard isn't feeling well. By his 6 week shot I assume you mean you had him to your vet to have his first set of vaccines. Vomiting can be a side effect/adverse reaction to vaccines. If he continues to vomit and isn't eating however this requires a visit to the vet. Usually with vaccines, if they vomit it is usually just once, so I would be worried about something else going on. I would suggest getting him seen. Your vet might want to test for parvo-virus and may want to do x-rays or bloodwork. Your vet may also just try some medications. Good luck with Blizzard.

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    Answered By Destini R. Holloway, DVM

    Veterinarian

    Published on December 1st, 2019

    I am so sorry to hear that your pet Molly is so ill. This sounds like a vaccine reaction and therefore she should be seen by a vet right away for treatment. I would recommend taking her in immediately b/c this cannot be treated for at home unfortuantely. I hope that your pet Molly is able to recover fully from this suspected vaccine reaction soon! Best of luck and take care.

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