Duvo Bite me Ultrasonic Penny the Penguin 17cm

Dogs can hear sounds at higher frequencies than humans. The Duvo+ Heardoggy product features a patented squeak sound modified to operate at an ultrasonic frequency beyond human hearing range, yet it remains enjoyable for your four-legged friend. It is manufactured with an extremely durable lining that makes the product strong enough to withstand the toughest play.