With its innovative delivery system, Seresto® offers a breakthrough in flea and tick protection for dogs or cats for eight months. Seresto® kills fleas within 24 hours and kills ticks within 48 hours of initial application. Features and benefits: For dogs or cats, Kills fleas, Repels and kills ticks. If a tick is repelled or killed, it cannot attach and transmit the organisms that may cause disease. Non-greasy, odorless, easy-to-use. Seresto® is for cats 10 weeks of age or older, and dogs 7 weeks of age and older.