Frontline Plus for Dogs Flea and Tick Small Dog Treatment 5-22 lb, 8 DosesProtect your small dog from annoying fleas, ticks, and chewing lice with Frontline Plus for Dogs Flea and Tick Small Dog Treatment 5 22 lb, 8 Doses. This trusted monthly topical treatment is specially designed for dogs weighing between 522 lbs, helping eliminate fleas, flea eggs, flea larvae, ticks, and lice before infestations spread throughout your home. Frontline Plus uses a fast acting waterproof formula that works continuously for up to 30 days