The active ingredient in NexGard Chewables is Afoxolaner. NexGard Chewables kill adult fleas and are indicated to the treatment and avoidance of flea infestations (Ctenocephalides felis), and also the treatment and Charge of the American Canine tick (Dermacentor variabilis), black-legged (deer) tick (Ixodes scapularis) and Lone star tick (Amblyomma… Read More