Frontline Plus Dog (23-44 lb) is the ideal solution for protecting your dog from parasites. This easy-to-apply topical treatment is designed to protect dogs in the 23-24 lb range from fleas, ticks, and chewing lice. It works by killing adult fleas, ticks, and chewing lice on contact and continues to work for a full month after application. With Frontline Plus Dog, your pup can stay healthy and free from parasites all year-round.