FRONTLINE Plus for Extra Large Dogs (89-132 lbs) Flea and Tick Treatment 3 DosesFRONTLINE Plus for Extra Large Dogs (89 132 lbs) Flea and Tick Treatment 3 Doses has been trusted by veterinarians for flea and tick control for dogs for nearly 20 years. Made with 2 tough killing ingredients fipronil and (S) methoprene one to kill adult fleas and ticks and the second to kill flea eggs and larvae this fast acting long lasting protection provides flea and tick control for dogs and puppies 8 weeks and older 89 132 lbs. Frontline Dog