Petco Text Logo
Petco Pet Logo

My dog has fleas despite Comfortis and Hartz collar. What to do?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Large (61lb +) | Female | spayed | 66 lbs

Is it okay to use comfortis pill and Hartz flea tick collar at the same time? Shes on both and I still find tiny fleas on her why? I’ve also bombed my house and my room

1 Answer

Most Helpful Answer

Image profile

Answered By Ricardo Fernandez, DVM

Veterinarian, Veterinary Oncology Resident

Published on October 22nd, 2017

Thanks for using Petco Pet Education Center, formerly Petcoach! While it is ok to use both, I would suggest a different approach if you are still finding fleas on Daisy. I would try a product called Capstar which can kill a lot of fleas at once and combine it with another monthly flea preventative other than Comfortis if you are not seeing the desired results currently. I would suggest products such as Frontline and Bravecto which are great. Good luck and have a great night!

Vote icon

2Pet Parents found this answer helpful

image
Have A Vet Question?

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

Sponsored