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Review title: Did not work for my dog
Product review: Historically, my family has had great success with frontline. I don't want to discourage anyone from trying it because I know it can work (based on the flea population characteristics your dog comes in contact with).We had been using this for 2 months when my dog went to a friends house while we were on vacation. When we got back, he had fleas galore. We put on the next frontline a week early and it did not even phase the fleas on him.We switched to K9 advantix II and the fleas were gone within a couple of days. I know that some fleas are now resistant to Frontline, and that certainly seemed to be the case for the fleas on my dog. I would recommend not buying any more than a 3 month supply at a time in case your dog gets fleas like mine that aren't phased by frontline. If you try Frontline and it doesn't work, k9 advantix II might, as it did for me.
