The Bird Ball Whistling Dog Toy is back by popular demand! Dogs love to fetch and retrieve the Bird Ball because it makes an enticing "whistling" sound when you toss it. The sound actually makes it easier for dogs to locate the dog toy. Each Bird Ball contains 12 wind-powered whistles that chirp when thrown and no batteries are required. Even little dogs can pick up Bird Ball by the wings, so this is a great toy for all breeds. Compatible with tennis ball launchers, this durable, non-toxic fetch toy even floats. Your dog will love it!