ZoGuard Plus for Dogs is the perfect solution to help protect your dogs against fleas and ticks. It uses Fipronil and S-Methoprene (insect growth regulator) as its active ingredients (same as leading competitor, FRONTLINE Plus) which effectively kills fleas, ticks (including those that may transmit Lyme disease) and chewing lice. ZoGuard features a sustained release formula which was developed to offer quick and long-lasting control, but with better value for the money. Product comes with three applicators and will provide a 3 month supply. Save money and purchase ZoGuard Plus!