This little gadget is awesome. It really works, my little dog is allergic to fleas, I give her flea pills from the vet, which work, but sometimes when we go for a walk, she will get a flea or two, so I seen this and thought why not, and to my surprize it really does work amd my little dog don't mind being combed with it. It does a little zap, but its not noticable. It's really easy to use, good simple instructions. My 2 cats even don't mind it. In my opinion, buy one you want be sorry.