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My 3-week-old puppies have diarrhea. Is it worms or mom's medication?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Small (up to 22lb) | Male | unneutered | 21 days old | 2 lbs

Hello, 2 of 6 newborn puppies 3wks old have diarrhea. Wondering if caused from worms (i have pic of poop)or possibly meds mother is on from mastitus? Puppies otherwise seem fine, hair is soft,starting to walk and play.

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1 Answer

Most Helpful Answer

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Answered By Dr. Dayna, DVM, CVA

Veterinarian, Certified Veterinary Acupuncturist

Published on May 2nd, 2018

I am sorry to hear that the pups are having loose stools. The amoxicillin could potentially be a part of then problem. However, parasites such as coccidia often cause diarrhea in pups. I would highly encourage you to have a fecal analysis run on the puppies to rule out any parasite problems. Best of luck and I hope they improve soon. Thank you for using Pet Coach.

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