Petco Text Logo
Petco Pet Logo
  • Two Easy Ways to Start Earning Rewards!

    rewards header
    Become a member today!
    Members-only pricing and offers, personalized care notifications, Vital Care points back on every purchase and more!
    Petco Pay LogoBecome a credit card member today!

    Earn 2X Pals Rewards points at Petco
    when you use Petco Pay!

    APPLY NOW
    Learn More About Petco Pay Benefits

Puppy passing tapeworms after deworming. Is a second dose needed?

Updated on September 23rd, 2025

Pet's info: Dog | Jack Russell Terrier | Female | unspayed | 4 months and 3 days old | 12 lbs

My puppy seems to be expelling long tapeworms 12 days after the vet dewormed her. Is this normal? How long does the dewormer last/take to work? She doesn't have any fleas. Does this mean these worms were passed on from her mother? The picture shown below was prior to the deworming on the 12th of June. These are much smaller than the ones coming out now.

1 Answer

Most Helpful Answer

Dr. Melanie, BVSc MS

Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on June 23rd, 2019

Penny needs a second deworming treatment two weeks after the first to kill all the worms. The first treatment kills the adults present, while the second kills the worms who had not yet hatched from eggs during the first deworming. I would take her back into the vet to get another treatment. Best of luck.
Vote Icon1Pet Parents found this answer helpful

Smart Picks for Smart Questions

Have A Vet Question?

Book an appointment with the pros – our expert vets are here to help.

Share

Styled arrow button