Petco Text Logo
Petco Pet Logo

My cat still has live fleas 12 hours after treatment. Is this normal?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Female | spayed | 10 months and 25 days old

It's been 12 hours since I gave my cat a flea treatment (I used Frontline) and I checked if she had any left and there are still eggs(I dont know if they are dead or not) and i found 2 alive fleas. (There might be more.) I'm pretty sure I applied the fleas treatment the right way. But is it normal to find alive fleas???? What can I do??

1 Answer

Most Helpful Answer

Image profile

Answered By Jessica Desrosiers

Veterinary Technician

Published on May 26th, 2019

It can take 24-48 hours sometimes to fully kill all fleas and eggs on the body. While you are waiting, you can use a flea comb to remove any that are still on the body that you find. Cleaning the environment is also important as warm weather can cause eggs that are in bedding, floorboards, baseboards, etc to hatch and cause a new infestation. Continued cleaning and treatment with flea medications can help prevent this.

Vote icon

1Pet Parents found this answer helpful

image
Have A Vet Question?

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

Sponsored