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My Great Dane puppy has diarrhea after deworming. Is this normal?

Updated On September 23rd, 2025

Pet's info: Dog | Great Dane | Female | unspayed | 3 months and 9 days old | 24 lbs

got a great dane puppy 8 days ago. she went to the vet wednesday and was given de wormer by the vet. she woke up saturday and had no energy. sunday she has had more energy but has began having diarrhea (no blood present) going back to vet tomorrow, just wondering what anyone else thinks. she has had 2/3 of her vaccines including parvo. in three weeks she goes back to get her final set of shots.

1 Answer

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on October 14th, 2018

There could be a number of things causing Luna's diarrhea, but given that she was dewormed recently, it could be the intestinal worms causing it. This can happen when a dog is dewormed. It's good that there is no blood in it, but keep an eye on her. If the diarrhea becomes bloody, she starts vomiting, she stops eating, and/or she becomes very lethargic, I would rush her into an ER vet right away. Best of luck.

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