PetLock™ Plus for Dogs is fast-acting, long-lasting, waterproof, and easy to use. Kills fleas, flea eggs & larvae and chewing lice.Kills all stages of ticks, including those that may transmit Lyme disease. Aids in control of sarcoptic mange mite infestations.• Adult Fleas.• Flea Eggs.• Flea Larvae.• Ticks.• Chewing Lice. Contains the same active ingredients as Frontline® Plus for Dogs. PetLock™ Plus for Dogs remains effective even after bathing, water immersion, or exposure to sunlight. PetLockPlus for Dogs can also be used on breeding, pregnant and lactating bitches.