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Why do fleas keep coming back on my dog despite Frontline Plus?

Updated On September 23rd, 2025

Pet's info: Dog | Cocker Spaniel | Female | spayed

My spaniel keeps getting fleas! We use frontline plus but they keep coming back!!!

1 Answer

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on July 18th, 2019

I personally have found some resistance to fleas with Frontline. I can give you a method that always works for me. First, I would give B Capstar. It's a one time pill that starts killing fleas within 30 minutes. Then follow up with a spot on treatment, such as Advantage or Revolution. This is a treatment that has to be used once a month. You will also have to disinfect the environment. Wash her bedding in hot soapy water, and vacuum the furniture and carpet surfaces. You can use a spray to kill fleas in the house, such as Indorex, or a flea bomb would work well to kill the fleas in the home. Best of luck.

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