JW EverTuff Boney Squeaky Ball is a squeaking chew ball for dogs that will hold its own against tough play. The Boney Squeaky Ball has been made from a combination of 2 durable materials; a rubber center provides a long-lasting squeaking, bouncing ball while the tough nylon ends offer a chicken flavoured, easy to chew gnawing area. Safe, long lasting chewing and gnawing!