It works well as a chew toy for the dog, but it can also be a fun interactive toy. When the owner tosses it for the dog to fetch or starts a tugging game with the dog. Discard if ball becomes worn. This toy encourages chewing and gnawing, activities that dogs naturally require. Always supervise your pet while he chews on his product, andremove if it becomes destroyed. Contains: Rubber. Size/Quantity: 3.5 INCH