ZoGuard Plus for Cats (Fipronil/(S)-Methoprene) is a once-a-month dose topical application that is indicated to kill fleas, ticks (deer ticks, brown dog ticks, American dog ticks, lone star ticks) and chewing lice. For use on cats and kittens 8 weeks of age or older and weighing 1.5 pounds or greater. See packaging for complete product details.