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My 12-week Shih Tzu puppy has diarrhea after vaccines. What to do?

Updated On September 23rd, 2025

Pet's info: Dog | Shih Tzu | Male | neutered | 2 months and 20 days old | 14.4 lbs

My shih tzu is almost 12 weeks and last saturday i took him to get his 3 set of vaccines. But saturday night I noticed that he pooped weird. And until right now he has diarrhea. What should i do

2 Answers

Most Helpful Answer

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Answered By Amy Poole, DVM

Veterinarian

Published on November 15th, 2017

I'm sorry that Jorkey is having diarrhea. It is unlikely that the diarrhea is related to getting the vaccines. It is possible it is due to intestinal parasites or even the de-worming medication, if he received that on Saturday. Stress can also cause diarrhea, so if he was anxious or stressed about the visit, that could have contributed. I would recommend you take him back to your vet to have his diarrhea evaluated. He may need a temporary diet change, probiotics, and potentially an anti-inflammatory medication for his colon. He also may need to be checked for intestinal parasites and be de-wormed with a different medication. I hope he is feeling better very soon!

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    Answered By Megan, DVM, CVA

    Veterinarian

    Published on

    Poor Jorkey! Since he is so small, I worry he will become dehydrated very quickly. You can try to feed him some plain chicken and rice but if he is still having diarrhea tomorrow, I would strongly recommend to have your vet look at him. Your vet will be able to help determine the cause of the diarrhea, assess his hydration and get him started on some medication to help him feel better. I hope this helps!

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