Chuckit Whistle Flight Disc Dog ToyThis unique fetch toy creates a continuous whistle sound as it flies through the air, keeping your dog interested and engaged during fetch. Specially designed reeds create the whistle sound as wind whips through the whistle chambers when thrown. The Whistle Flight is made of light weight, flexible natural rubber that is gentle on your hands and your dogs mouth. The Whistle Flight was carefully engineered to securely house the whistles within the flyer