SENTRY Fiproguard for Cats, Flea and Tick Prevention for Cats (1.5 Pounds and Over), Includes 6 Month Supply of Topical Flea TreatmentsCAT FLEA AND TICK CONTROL: SENTRY Fiproguard topical flea and tick prevention for cats kills fleas, ticks and chewing lice for up to 30 days. VET QUALITY FORMULA: SENTRY Fiproguard is a vet quality formula flea treatment that contains the active ingredient fipronil. FOR KITTENS AND CATS: Flea and tick control can be used on cats and kittens 8 weeks and older, and 1. 5 pounds and older. TICK PREVENTION: Fiproguard for cats also kills deer ticks that