KONG Classic Stuffable Dog Toy - Fetch & Chew Toy for Dogs - Treat-Filling Capabilities & Erratic Bounce for Extended Play Time - Durable Natural Rubber Material - for Medium DogsSatisfy Instinctual Needs: The KONG Classic red rubber toy helps satisfy dogs' instinctual needs and provides mental stimulation; toy helps solve chewing, teething, boredom, crate training, digging, barking and more Enticing Chew Toy for Dogs: This unique toy has an erratic and unpredictable bounce, keeping all breeds of dogs engaged and entertained during interactive play sessions Treat Filling Capabilities: The hollow interior allows for stuffing