Help protect your best bud from fleas with FRONTLINE Gold for Dogs Flea & Tick Treatment. This formula helps kill adult fleas, flea eggs, flea larvae, and ticks after regular use. It’s formulated with three active ingredients—fipronil, (S)-methoprene, and pyriproxyfen—to help disrupt the flea life cycle and fend off future flea infestations. Plus, it’s simple to apply, and designed to be waterproof and last for one month. Enjoy walks and hikes with your canine companion without worrying about nasty pests.