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Review title: Worked for over a year and then became totally ineffective
Product review: We started using this product for our cat because it was provided to us by the animal shelter we adopted him from. It worked very well for over a year and then we began to notice fleas increasing in quantity. I discussed this with our Vet, and he recommended changing to Advantage. He said that others have complained about the same situation we experienced and that he was planning on not stocking it any longer because of that. His opinion was that Frontline doesn't kill fast enough and that after a period of time the fleas adapt and are able to prosper. We've changed to Advantage and all fleas have vanished over a 2 week period. We've used Advantage in the past and now will stay with it again. Sorry Frontline....you need to improve your product!
