Sentry Sergeants Pet Care Product 5 Count Flea and Tick Squeeze-On Dog Drop. Kills fleas, ticks, flea eggs and flea larvae Repels mosquitoes Kills and repels fleas, up to 1 month, ticks up to 1 month, flea eggs up to 4 months and larvae up to 4 months Use only on dogs 3 months of age or older DO NOT USE ON CATS or animals other than dogs.