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Why is my puppy vomiting and having diarrhea weekly after diet change?

Updated On September 23rd, 2025

Pet's info: Dog | Labrador Retriever | Female | unspayed | 2 months and 10 days old | 30 lbs

Olie is not well. Once a week she does vomits/loose motion... Then o gavr her medicine.. She is fine for weeks.... Then again... I dont know why... I recently increase her diet.. I gave her pedigree puppy chiken milk.. Next week she will be having her 7 in 1 and corona vaccination booster.. Please help her somebody... I am very upset.. Sometimes i feel Like am gonna lost her soon

1 Answer

Most Helpful Answer

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Answered By Amber Da Silva, DVM

Veterinarian

Published on August 6th, 2017

I'm sorry to hear Olie is feeling sick. The most common reasons for puppies to have vomiting or diarrhea are parasites, eating things they shouldn't (food and non-food), food change and infectious diseases like Parvo and Corona virus. If she's completely normal in between (active, playful, eating and drinking) then maybe she is getting into something and it is upsetting her system. It would most likely not be Parvo or Corona since it keeps happening over and over. I would find a good-quality puppy food and only feed her that. Don't give her anything else (people food or treats) and hopefully as she gets used to the diet, the symptoms will resolve. If she is acting sick in between and very sick during these times she vomits and has loose stool, I would take her to a veterinarian for testing. They may want to do a fecal exam to look for parasites and do blood work and x-rays to see if there is any other reason she may be acting sick. I hope she feels better soon!

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