Contains Fipronil – the active ingredient used in Frontline Top Spot® for dogs*. FiproGuard™ topical flea and tick squeeze-on for dogs provides three-way protection that kills fleas, ticks, and chewing lice. It kills deer ticks that may transmit Lyme disease as well as brown dog ticks, American dog ticks, and lone star ticks. It also controls mites that may cause sarcoptic mange. Waterproof. Can be used on breeding, pregnant, and lactating dogs. Fast-acting and long-lasting, sustained-release formula protects dogs for up to 30 days.*FIPROGUARD™ is a trademark of Sergeant’s Pet Care Products, Inc. Frontline Top Spot® is a registered trademark of Merial. Frontline Top Spot® and Merial are not affiliated with Sergeant’s Pet Care Products, Inc.