Puppy pooping worms after deworming. Is it working or concerning?
Updated On September 23rd, 2025
Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Female | unspayed | 11 lbs
My puppy recently went to the vet and took some heart worm and flea medicine today. Later on in the day I noticed long worms in her poop. Should I be really concerned or is this just the medicine working and deworming her?
4 Answers
Most Helpful Answer
Published on January 3rd, 2018
Congratulations on your new puppy. I have a dog named Hayden too! I suspect what you are seeing are roundworms. They are commonly passed in the stool after deworming, so you are correct that it just means that the medication is working. I have attached a handout below with more information on roundworms. https://www.veterinarypartner.com/Content.plx?P=A&S=0&C=0&A=476 Since we now know she had a roundworm infection, be sure to clean up after her each time she goes, so the yard does not get infected. I hope that was helpful. Thanks for using PetCoach.
1Pet Parents found this answer helpful
Related Answers from Veterinarians
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Published on September 7th, 2017
There are over-the-counter dewormers such as pyrantel that will kill roundworms. These types of worms are very common in puppies. I would also recommend doing a fecal exam when it's time for Bennett's first vet visit. This will check for other parasites that pyrantel doesn't kill and then he can be treated accordingly.
1Pet Parents found this answer helpful
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Published on January 7th, 2018
If you're sure of what worms are present, you can go ahead and give a dewormer now, and let your vet know. Your vet may also recommend deworming again in a few weeks, especially if there was a large parasite load. If you're unsure of the type of worms, it would be best to bring in a sample of Lola's stool to your vet to have it examined so that the correct medication can be given to treat it. If the exam is in the next day or so, you can bring in the fecal sample with you to have it tested at your appointment.
1Pet Parents found this answer helpful
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Published on September 14th, 2020
Roundworms are very common in puppies! From the picture, she definitely has them! While there are OTC medications that are good (Bayer is about the only one I would recommend), the best dewormers are from the vet. Truly, you get what you pay for in terms of dewormers, flea treatment, etc. You also just got Snowflake, and she should see a vet anyway to get vaccines done and while there, the vet can give her a deworming treatment. In this case, I recommend seeing the vet. I hope this helps!
1Pet Parents found this answer helpful
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