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My dog is skinny and vomiting, but no worms after deworming. Help?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Female | 2 years and 5 months old | 15 lbs

I've given my dog worm medicine and I see nothing in her poop. She's gotten so skinny and everything she eats she throws up

1 Answer

Most Helpful Answer

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Answered By Stephanie Echols, DVM

Veterinarian

Published on September 3rd, 2017

Thanks for using Petco Pet Education Center, formerly Petcoach and I'm sorry to hear Spot isn't feeling well. There are several different intestinal parasites and not all dewormers treat them all. Also, you may not always see worms pass in the stool after giving a dewormer. I recommend taking Spot to a vet with a fresh stool sample to look for microscopic parasite eggs. They can also give her an exam and make sure nothing else is causing her to lose weight and vomit. Good luck and kisses to Spot!

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