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My dog still has live worms after OTC dewormer. What's next?

Updated On September 23rd, 2025

Pet's info: Dog | Chihuahua | Female | unspayed | 2 months and 19 days old | 1lb

I gave all my dogs some OTC dewormer the first dose on 8/4 and second dose on 8/18 like it states. Then after that it's every 30 days. My question is outta all 5 of my chihuahua's (2-1 yr olds and 3-2 1/2 mon olds) she is the only one still pooping out live worms! What can I do and do I need to treat them all again? If so will it be safe? I used Pro sense liquid dewormer.

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2 Answers

Most Helpful Answer

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Answered By David Elbeze, DVM, MRCVS

Veterinarian

Published on August 27th, 2017

There is no need to treat the others but she needs to be treated again, this dewormer is probably not very effective, i strongly recommend getting a better quality dewormer such as Drontal or Panacur.

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    Answered By Dr. Melanie, BVSc MS

    Veterinarian

    Published on March 4th, 2017

    Starting Maddox on a deworming treatment was a good idea and considering the worm he threw up was long, it's likely he has roundworms. An OTC dewormer will kill them. He will need another deworming treatment two weeks after this one to kill all the worms present. After that, he will need to be dewormed every three months.

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