We have an occasional tick around here but none have actually made it into the house since our dogs went to the Rainbow Bridge a few years ago and my cats are inside cats. With Bella coming into our lives I know that is about to change. We thought she had fleas because one night after a vet visit she was scratching. We bought some Advantage from him and enough to do the cats if need be, but we never saw a flea and the scratching didn't continue. For now I am just storing it on a shelf until it is needed. I am sure we will need it before summer is over. With her fur being so light it will make "tick spotting" easy.