The KONG AirDog Squeaker Stick combines two classic dog toys ? the tennis ball and the squeaker toy ? to create the perfect fetch toy. Our durable, high-quality AirDog Bone will not wear down a dog's teeth. It's made with a special nonabrasive felt, compared to the abrasive material on normal tennis balls. Use the Squeaker Stick as a safe alternative to those dirty sticks your dog finds in the yard.