ZoGuard Plus for dogs, comparable to frontline plus contains the same active ingredients and offers the same level of flea and tick protection at a better value. ZoGuard Plus for dogs is effective against all life stages of the flea, effectively breaking the life cycle and controlling re-infestations. Each package includes 3-monthly doses providing 12 weeks of protection. ZoGuard Plus for dogs is waterproof and will remain effective even after bathing, water immersion or exposure to sunlight.