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My dog has fleas again in 9 days. Can I reapply topical treatment?

Updated On September 23rd, 2025

Pet's info: Dog | Rhodesian Ridgeback | Female | spayed | 43 lbs

I put Petlock on my dog and it worked well for a week. When I did see a flea or two on her they would appear to be dying. I washed and cleaned everything in the house. Now 9 days later I am seeing way too many fleas on her and they seem healthy. Can I apply more topical medication to her even if it's only been 9 days?

1 Answer

Most Helpful Answer

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Answered By David Elbeze, DVM, MRCVS

Veterinarian

Published on August 19th, 2017

You can apply a different topical or oral flea medication but not the same one. bear in mind advantage and advantix are the same as Petlock so you cannot use these either. other options you can use: Spot ons: Revoulution (stronghold in the UK) Frontline (ticks as well) Tablets: Trifexis/comfortis Bravecto (ticks as well) - Collar: Seresto ( (ticks as well) House spary: Indoorex

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