My puppy just had his vaccinations and had diarrhea an hour or so after that is that normal? Pet's info: Dog | Shih Tzu | Male | unneutered | 1 month and 17 days old | 6 lbs

Yes, this can be normal. Withhold food for 12 hours, then feed a bland diet of boiled white meat chicken (no bones) and white rice in small amounts several times a day for a couple of days. Then slowly add back in her normal diet. If the diarrhea continues on the bland diet, she starts vomiting food, stops drinking water, starts vomiting water, or becomes very lethargic, she will need to see a vet right away. Best of luck.

You can see some diarrhea after a vaccine as a side effect, and it should clear up in a day or two. If it does not clear up, or it becomes excessive, you will need to take your puppy into the vet. You can try withholding food for 12 hours, then feeding a bland diet of boiled white meat chicken (no bones) and white rice in small amounts several times a day for a couple of days to see if that helps with the diarrhea. Then slowly add back in his normal diet.

Poor Simba. Feed him a bland diet of boiled white meat chicken (no bones) and white rice in small amounts several times a day for a couple of days. Then slowly add back in his normal diet. If the diarrhea continues on the bland diet, he starts vomiting food, stops drinking water, starts vomiting water, or becomes very lethargic, he will need to see a vet right away. I hope this helps.

Is it normal for my puppy to have diarrhea after vaccinations?

Updated On September 23rd, 2025

My puppy just had his vaccinations and had diarrhea an hour or so after that is that normal?

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Answered By Catherine Stecyk 227

Veterinarian

Published on March 2nd, 2019

Hello and thank you for reaching out to Petco Pet Education Center, formerly Petcoach. I'm sorry to hear that Apollo had some diarrhea after receiving his vaccines. It is not unusual for puppies to experience mild vaccine reactions, which can manifest as a small amount of vomiting and/or diarrhea. Apollo may be more lethargic/sleepy after his vaccines too. As long as he is otherwise acting normally and is not vomiting repeatedly or experiencing any other abnormal clinical signs (itchy skin, redness, etc) he will likely be OK. If you are ever concerned that he is not acting right or seems very dumpy, he should be seen by a veterinarian right away. I recommend still letting your veterinarian know that Apollo had this reaction so they are aware of it for next time. I hope this is helpful!

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Is it normal for my puppy to have diarrhea after vaccinations?

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