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My puppy passed a worm after deworming. Is it too soon to re-dose?

Updated On September 23rd, 2025

Pet's info: Dog | German Shepherd | Male | unneutered | 3 months and 4 days old | 15 lbs

I started my puppy on deworming medicine on Saturday and it ended today I do not think he ingested all the meds as it was powder form. He had an accident today and I found a long white worm. Is it too soon to start him on another deworming medicine?

1 Answer

Most Helpful Answer

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Answered By Angel Alvarado, LVT

Licensed Veterinary Technician

Published on December 5th, 2016

Yes, it is too soon. You deworm again, if necessary in 2-3 weeks. It is common to see a purge of live or dead worms after a deworming medication is given. Most dewormers cause a paralysis in the parasites that makes them unable to hold on to the intestinal walls of their host (your puppy). This allows the body to rid itself of them by expelling them out in the stool.

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