"About 5 years ago I had a HUGE flea problem on my German shepherd. It got so bad that not only were they festering on him, they were all over my family, too. I tried everything: the dips, shampoos, the spot-on treatments at the hardware store (which never worked so I assumed all spot-on treatments were similar) and nothing worked. After washing him about once a week and putting bug killer all over the house I wondered why the treatment at the hardware store was only 10 dollars and Advantage was around 50. So I bought it. And BOY that thing MASSACRED the fleas and WORKED. So why did I rate this a 1?
I bought an Australian shepherd with fleas and I had an indoor cat that was getting fleas. When I went to apply Advantage, I know they're not going to vanish in five minutes, so I usually give it about 4 days. 4 days pass. Fleas jumping on me at night, when I'm on the computer, when I'm driving to work. I vacuum my house and reapply Advantage. Still fleas. TO THIS DAY THE FLEAS HAVE NOT DIED. I see them running around in circles and unable to jump, and so I captured a few of these and put them in a clear container. They looked as if they were about to die. Running around in circles, not jumping, twirling around and rolling around. Two days later I see them happily jumping around waiting to get out. DID THEY CHANGE THIS PRODUCT OR ARE THESE FLEAS IMMUNE TO THIS NOW? WHAT IS THIS????"