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 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.