The Boomer Ball Is The Perfect Durable, Hard Wearing Toy. It Is Virtually Indestructible And Is Ideal For Those Ball-Obsessed, Toy Destroyers; The Larger-Than-Life Characters Who Love To Chase And Conquer. The Boomer Ball Is Not Intended For Your Dog To Carry. It Can Also Be Used As A Therapeutic Toy To Enrich The Environment Of Elephants, Pigs, Polar Bears Or Any Other Bored, Inquisitive Animal. Available In Four Sizes; 4″, 6″, 8″ & 10″. The Size Selected Should Be Larger Than Your Dogs Maximum Jaw Gape