Smart Pet Feeder Tennis Ball Missing Device Throwing Reward MachineOverview: 1. This is a good helper to train your dogs. Training your dog to put the ball into the machine Wait for the ball roll out along the track (Please note the ball does not fly out by being launched) 2. The snack will also roll out along the tunnel, interactive with dogs and making them enjoy the fun of the game. 3. This is an automatic toy, which allows you to release your hands and let them play with themselves. 4. Preventing your friends