Petco Text Logo
Petco Pet Logo

  • Two Easy Ways to Start Earning Rewards!

My puppy threw up worms, but I don't see them in his poop. Why?

Updated On September 23rd, 2025

Pet's info: Dog | Rat Terrier | Male | unneutered | 2 months and 23 days old

My 2 and a half month old puppy had worms in his vomit this morning but no signs of worms in his poop all day

2 Answers

Most Helpful Answer

Image profile

Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on February 28th, 2017

The worms in Herbie's vomit indicate he does have intestinal worms. You often don't see worms in the poop unless there is a very heavy infestation of them. The eggs are what are deposited in the feces, and those can only be seen with a microscope. Herbie needs a deworming treatment, and I recommend Panacur which you can get OTC. He will need another deworming treatment two weeks after the first to kill all the worms, and then will need one once a month until he is six months old. After that, he will need a deworming treatment every three months.

Vote icon

1Pet Parents found this answer helpful

Other Answers

  • Image profile

    Answered By Andrea M. Brodie, DVM

    Veterinarian

    Published on January 18th, 2017

    Your puppy has a serious worm infection (likely round worms). Sometimes, when the intestine is full of worms they can end up in the stomach and then get thrown up. You will need to worm your puppy now and again in 2-3 weeks with a puppy wormer. Actually your puppy is due for vaccinations at this age anyway, so take him to the vet and tell him about the worm, so he can worm your puppy.

    Vote icon

    2Pet Parents found this answer helpful

See More Answers

Related Questions

Petco Pet Education Center
Health & Wellbeing
Why is my mouse's eye swollen, cloudy, and has pus?
Is your mouse's eye swollen, cloudy, and pussy? Dr. Melanie, a certified vet, discusses severe eye issues like infection or abscess, urging an immediate visit.
Updated on December 04, 2025
Petco Pet Education Center
Health & Wellbeing
What fish dog food helps dry skin if my dog eats Science Diet?
Is your dog's dry skin a concern? A certified vet offers expert advice on finding the best fish-based dog food alternatives to Science Diet for essential oils.
Updated on February 04, 2026
Petco Pet Education Center
Health & Wellbeing
My pet is breathing hard, not eating, and lethargic. What's wrong?
Is your rat breathing heavily, won't eat, and has no energy? A Licensed Vet Tech explains potential causes like infection and age, urging a vet visit for diagnosis.
Updated on December 04, 2025
Petco Pet Education Center
Health & Wellbeing
My pet has red spots all over. What's causing them and what to do?
See red spots on your pet? A certified Petco vet discusses common causes like allergies, infections, or mites, guiding you on diagnosis and treatment options.
Updated on December 04, 2025
Petco Pet Education Center
Health & Wellbeing
My small pet is limping and can't bear weight. Should I see a vet?
Is your pet limping and can't bear weight? A certified vet explains why a suspected fracture needs immediate diagnosis and safe pain relief. Get expert guidance.
Updated on December 04, 2025
Petco Pet Education Center
Health & Wellbeing
My dwarf hamster has a shut eye and is limping. What should I do?
Is your dwarf hamster struggling with eye issues or limping? A trusted vet offers expert guidance on symptoms and crucial next steps for comfort and care.
Updated on December 04, 2025
image
Have A Vet Question?

Book an appointment with the pros – our expert vets are here to help.

Book Now

Sponsored