My cat is a long haired mix with a terrible allergy to fleas. If she even gets one flea on her she starts scratching non-stop to the point where she makes herself bleed. Our vet recommended the Bayer Advantage II for cats and it has saved her from being a scratched up mess. I simply apply the product once a month in the area right in the middle of her ears and shoulder blades. If seems like that area works best for her because her tongue can’t reach that far back to lick it off, although she tries! The product is really easy to apply, but I do have to hold her firmly to be able to apply it. We live in an area of the country where it is very hot and humid during the summer months and the fleas are really bad at that time of year. We have a dog as well as a cat and if we didn’t use the flea control on both of them the cat would just go crazy with the fleas. She stays indoors all of the time but the dog brings the fleas in from outside so having this product available is a life saver for the cat due to her allergies.