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My puppy has diarrhea and won't eat after Nexgard. What should I do?

Updated On September 23rd, 2025

Pet's info: Dog | Pekingese | Female | unspayed | 2 months and 20 days old

My puppy got a Nexgard chewing pill a few days ago. Since then she had mucousy diarrhea and doesn't want to eat at all. What should I do with her?

1 Answer

Most Helpful Answer

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Answered By Dr. Massimo Orioles, DVM, Cert AVP, MRCVS

Veterinarian

Published on September 4th, 2016

That could happen after administration of Nexgard, even though is quite unusual and it is more likely to be dietary related. I would suggest to withhold food for the next 4 hours and then start feeding with a bland diet based on boiled chicken and rice in small portion every 6 hours for the following 48hours. Then gradually reintroduce the normal diet over 5 days. I would definitively recommend a veterinary check up if the signs persist or you notice diarrhea, vomiting, lethargy or inappetence.

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