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Is puppy vomiting and diarrhea common after recent vaccinations?

Updated On September 23rd, 2025

Pet's info: Dog | Australian Shepherd | Male | unneutered | 3 months and 10 days old | 19.6 lbs

My 14 week puppy got his third DA2PPV and his rabies vaccine yesterday. Ate lunch fine burnt ate dinner and threw up; ate breakfast next day and threw up and had a loose BM at 3 am before breakfast. Is this common?

4 Answers

Most Helpful Answer

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Answered By Megan, DVM, CVA

Veterinarian

Published on January 11th, 2018

Tis could be a minor vaccine reaction. I would feed her some chicken and white rice to help settle her tummy. You can also give her Benadryl twice a day. See link below. I would also notify your vet so they can make alerts in her chart for the future. If she corninues I would let you vet know. I hope this helps!

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    Answered By Rodrigo Roca, DVM

    Veterinarian

    Published on August 2nd, 2017

    Hello, sorry to hear about Nova. Vaccines can definitely cause GI upsets as a delayed allergic reaction. This is generally self limiting but most of the time involves vomiting and a decreased appetite. If it doesn't clear up then I would be concerned with something else going on with Nova. You should bring a stool sample to your veterinarian to check for any parasites, giardia, or coccidia that she may have picked up, as those can also be a cause of diarrhea especially in young puppies. Additionally, due to her age, monitoring for any lethargy and poor appetite may be an indication to also test for viral diseases. Hope this helps.

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    Answered By Ricardo Fernandez, DVM

    Veterinarian, Veterinary Oncology Resident

    Published on August 27th, 2017

    Hi there! Thanks for using Petco Pet Education Center, formerly Petcoach! Sorry to hear that Nova is not feeling well. This is concerning in a puppy as this could represent a variety of conditions such as parvovirus, even if she has already received the first vaccine. Other possibilities include intestinal worms or even gastroenteritis or dietary indiscretion. I recommend that you have Nova evaluated by your veterinarian for further assessment and treatment. The sooner these types of conditions get treated, the better. Good luck!

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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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