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Seeing worms in puppy stool after deworming. Is this normal?

Updated On September 23rd, 2025

Pet's info: Dog | Border Collie | Female | unspayed | 2 months and 18 days old | 9.6 lbs

My 11 week old puppy was diagnosed with round worms. She was given two sets of medication. fenbendazole And dolpac. She also has giardia. The fenbendazole was in powder form given for 7 days once a day. We finished this powder yesterday but still see eggs in stool. Is this normal or should we get more?

2 Answers

Most Helpful Answer

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Answered By Amber W

Veterinarian, Certified Veterinary Acupuncturist

Published on September 1st, 2017

Hello and thanks for using Petco Pet Education Center, formerly Petcoach! Parasite eggs are microscopic so I'm wondering if what you're seeing in the stool is actually eggs. It could be adult roundworms or even tapeworm eggs. It is not uncommon to see the adult roundworms as they are killed by the deworming process. If it is tapeworm eggs, you may need to end up treating for fleas (as this is how tapeworms are spread). The Dolpac should help treat for tapeworms and the praziquantel should be effective for giardia and roundworms. It is possible that you may end up needed to retreat but I suspect what you are seeing may be normal for the deworming process. Definitely take a fecal sample back to your veterinarian in about 3 weeks to ensure the infection is cleared. Also the prevent reinfection make sure to clean up your dogs feces from the yard. If at any time Echo seems to be acting ill or has diarrhea I would take her back to your veterinarian.

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1Pet Parents found this answer helpful

Other Answers

  • Image profile

    Answered By Amber W

    Veterinarian, Certified Veterinary Acupuncturist

    Published on

    Hello and thanks for using Petco Pet Education Center, formerly Petcoach! Parasite eggs are microscopic so I'm wondering if what you're seeing in the stool is actually eggs. It could be adult roundworms or even tapeworm eggs. It is not uncommon to see the adult roundworms as they are killed by the deworming process. If it is tapeworm eggs, you may need to end up treating for fleas (as this is how tapeworms are spread). The Dolpac should help treat for tapeworms and the praziquantel should be effective for giardia and roundworms. It is possible that you may end up needed to retreat but I suspect what you are seeing may be normal for the deworming process. Definitely take a fecal sample back to your veterinarian in about 3 weeks to ensure the infection is cleared. Also the prevent reinfection make sure to clean up your dogs feces from the yard. If at any time Echo seems to be acting ill or has diarrhea I would take her back to your veterinarian.

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    1Pet Parents found this answer helpful

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