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My dog's poop is smaller on melatonin chews. Is this normal?

Updated On September 23rd, 2025

Pet's info: Dog | Shih Tzu | Male | neutered | 10 years and 5 months old | 12 lbs

Romeo has been taking Naturvet Calming Chews with Melatonin in it. I noticed his stool isn’t as big as usual since being on the chews. This was today. It’s not hard though like consipation. Does this look pretty normal? Thanks!

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1 Answer

Most Helpful Answer

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Answered By Dr. Strydom, DVM

Veterinarian

Published on July 26th, 2023

Hello, thank you for using Petco Pet Education Center, formerly Petcoach. The stool looks normal to me. As long as he is not straining when trying to defecate I would not worry about it too much. Melatonin does have a tendency to slow down the GI tract a bit so the changes in the stool are most likely from the chews. Just keep an eye on it. Hope this helps. Best wishes.

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