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My dog pooped a long, earthworm-like worm. What could it be?

Updated on September 23rd, 2025

Pet's info: Dog | Mixed Breed Small (up to 22lb) | Female | unspayed | 4 months and 13 days old

My dog has pooped out something that looks like a regular worm you would find in the ground. It was really long. What could this be?

1 Answer

Most Helpful Answer

Makenzie Kurth, DVM

Answered By Makenzie Kurth, DVM

Veterinarian

Published on February 15th, 2018

Thanks for using Petco Pet Education Center, formerly Petcoach! If you physically saw a long white worm come out with Suzie's poop, it is likely a roundworm. If you saw the poop a few hours later and it looked more like a small earthworm, it is more likely a fly larvae. If it's the first, check out a dewormer such as Sentry HC WormX Plus Flavored De-Wormer Chewables for Dogs, (Pet Co). Be sure to check that the product is labeled for Suzie's weight and age. Then just use as directed on the box. If it was the second, ignore it!

Hope this helps and best of luck to you and Suzie!
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