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My puppy has constant diarrhea after deworming. What's wrong?

Updated On September 23rd, 2025

Pet's info: Dog | Australian Shepherd | Male | 13 lbs

I have a 13 week old puppy almost fully vaccinated, he has been de wormed. He has had constant diarrhea since we got him.

2 Answers

Most Helpful Answer

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Answered By Dr. Dayna, DVM, CVA

Veterinarian, Certified Veterinary Acupuncturist

Published on September 20th, 2017

There are other parasites that can cause diarrhea that are not killed with the routine dewormers. I would recommend a full fecal exam with your veterinarian to see if there is a different medication that may be helpful. Sometimes probiotics and a bland diet may be helpful as well.

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Other Answers

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    Answered By Dr. Leigh, DVM

    Veterinarian

    Published on January 18th, 2017

    If he still has diarrhea after everything that you have tried than he should be examined by a vet to determine the cause. He could have Giardia or Coccidia which are not treated with a regular dewormer. They both require a specific medication to treat and your vet can test a stool sample to look for all parasites and prescribe medications to help clear up the diarrhea. Adding a probiotic, like Fortilora or Proviavble, may help, too.

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