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My dog gains and loses weight, stomach changes. Should I worry?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Large (61lb +) | Female

My dog has had worms and Parvo I have been deworming her very two weeks , she eats quite a bit and drink bunches of water. She gains weight but she loses it in a few days a week maybe but it isn’t like her ribs are showing it’s just her stomach goes down should I be concerned

1 Answer

Most Helpful Answer

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Answered By Linda G, MS, DVM

Veterinarian

Published on August 7th, 2019

Hello. It does not sound like Luna has Parvo. Dogs with Parvo will not eat, vomit & have profuse & often bloody diarrhea. There are just too many other causes of weight loss in dogs that you are really better off working with your vet to try & narrow down the causes. Not all weight loss issues are due to worms, there are infectious, metabolic & endocrine problems that can all cause these symptoms. Good luck & thanks for using Petco Pet Education Center, formerly Petcoach.

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