Advantage II Flea Control for Kittens 2-5 lbs (12 Month) helps protect your furry friend from parasitic pests and the potentially harmful diseases they can transmit with Advantage II Flea Treatment for Small Cats & Ferrets. This highly-effective, veterinarian-recommended treatment is specifically formulated to kill all life stages of fleas on contact with no painful biting required. With three-way protection that kills the eggs, larvae, and adults, it breaks the flea life-cycle to help prevent re-infestation of your pet and your home. The waterproof formula continues working for up to four weeks, even after bathing; for use on kittens and cats 8 weeks or older and weighing between 5 and 9 pounds, as well as ferrets 10 weeks or older and weighing 1 pound or more. Key Features and Benefits Veterinarian-recommended Safe to use for cats 8 weeks or older and weighing 5-9 pounds Safe to use for ferrets 10 weeks or older and weighing 1 pound or more. Fast-acting formula kill fleas on contact in as quickly as 12 hours after application. Completely kills eggs, larvae and adult fleas to break the life-cycle and prevent re-infestation. Waterproof formula continues working for up to four weeks, even after bathing. Convenient, monthly topical application contains imidacloprid and pyriproxyfen; available in packs of 2, 4, 6, or 12 treatments.