The best thing ever to control fleas. Not all flea collars get all the fleas, powders and sprays can be harmful to your cats. I tried this comb, being skeptical, but to my surprise it works miracles! Just get a cup of water. Run the comb through your cats fur. Then dip the comb in the water. Watch the fleas fall off into the water. Your cat loves the attention and the combing of their fur. In the end it makes your cat feel better and they don't even realize why.