Catch Ball Red Hard Dog ToyThe nodules on the surface prevent total blockage of a large dogs airways should the ball get stuck in the throat. Catch Ball Red is suitable as interactive toys for all size dogs. 100% Safe and Non Toxic replacement for tennis balls which can be made from a number of nasty materials and pose a choking hazard. Design Specific means the dog cannot close its mouth on the ball with enough pressure to pop or chew it. Easy to catch and retrieve. Thick and durable this ball will outlast any tennis ball.