Petco Text Logo
Petco Pet Logo

  • Two Easy Ways to Start Earning Rewards!

My dog threw up a moving worm after deworming. Should I see the vet?

Updated On September 23rd, 2025

Pet's info: Dog | Border Collie | Male | 1 month and 26 days old | 10 lbs

My dog just threw up what seems to be a round worm. He supposedly had a deworming on December 3rd. The worm that he threw up was moving and I don’t know if I should take him to the vet or wait. No worms in his stool.

This question includes photos that may contain sensitive content. Click to view.

View more to consider that the photos may include sensitive content.

3 Answers

Most Helpful Answer

Image profile

Answered By Maria DVM

Veterinarian

Published on December 9th, 2017

I would recommend letting your veterinarian know that Bernie vomited a roundworm. It is very common for puppies to have roundworms and the dewormer is most likely killing them off. I would recommend depending on what type of dewormer to deworm again in 2 weeks or change the dewormer. Sometimes it takes a second round of deworming puppies. Thank you for using Petco Pet Education Center, formerly Petcoach.

Vote icon

2Pet Parents found this answer helpful

Other Answers

  • Image profile

    Answered By Ana M, DVM

    Veterinarian

    Published on March 18th, 2020

    Thank you for submitting your question regarding Courage. Round worms are common in dogs and can look like spaghetti. I recommend that he sees his veterinarian. He will need to be examined. I worry that he will be dehydrated from vomiting so much. If so, he would benefit from subcutaneous fluids and anti-nausea medication. Fecal testing will need to be performed. It is common for dogs to be infected with more than one type of parasite. It is important to know so that he can be treated properly. Many parasites can be spread to humans as well. I hope this information helps!

    Vote icon

    1Pet Parents found this answer helpful

  • Image profile

    Answered By Dr Stafford, BVetMed, MRCVS

    Veterinarian

    Published on March 22nd, 2018

    They look like round worms which are fairly common, regular worming should help this. As long as the burden is not huge they should not go too much damage, however in extreme cases symptomatic and supportive treatment can be required.

    Vote icon

    1Pet Parents found this answer helpful

See More Answers

Related Questions

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's ear mite treatment isn't working. What else could it be?
Pet still itching after treatment? A Petco vet clarifies it may not be ear mites. Discover effective solutions like Revolution or consulting an exotic vet.
Updated on December 04, 2025
Petco Pet Education Center
Health & Wellbeing
My pet has worsening sores and scratches. Could it be an infection?
Nike's worsening sores and constant scratching worry his owner. A certified Petco veterinarian offers expert guidance on potential causes like bacterial infections and next steps.
Updated on December 04, 2025
Petco Pet Education Center
Health & Wellbeing
Why do my hermit crab's mites keep returning? How to get rid of them?
Is your hermit crab battling recurring mites? A certified veterinarian explains why these persistent mites keep coming back and how to effectively address them. Get expert advice!
Updated on December 04, 2025
Petco Pet Education Center
Health & Wellbeing
Found a worm in my new chick's water dish. Is it a parasite?
Concerned about a worm in your new chick's water dish? A certified vet discusses possible parasites and recommends a fecal exam for your young chickens.
Updated on December 04, 2025
Petco Pet Education Center
Health & Wellbeing
Why is my chicken pale, tired, not laying, and pooping neon yellow?
Is your pet chicken pale, tired, or pooping neon yellow? A Licensed Vet Tech shares vital steps for your hen's concerning symptoms. Get expert guidance now!
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