Mad Cat® Dizzy Desert 100% Filled Catnip Cat Toy features a fun cactus design and is 100% filled with catnip and silvervine Our North-American-grown Catnip catnip has been grown to achieve the strongest, most aromatic catnip ever produced! When catnip is pinched, the aroma stored in the dried leaves is released, driving cats wild. Catnip is a 100% natural herb that stimulates a harmless, playful reaction in most cats. Cats need mental stimulation from play to keep from getting bored and to fulfill their hunting instincts. Physical activity from play acts as a workout, keeping cats physically fit enriching the pet's quality of life, and fostering a healthy relationship between the pet and their parents.