I bought another man-made bone for Coco but none for Wawa because he would just abandon his and grab whatever interests Coco. Wawa is an extremely covetous dog. Coco chased him round and round until she got tired and flopped on the floor and when she does that Wawa will settle down not too far from her and chew the bone spitefully. Then the chase will continue and Coco will look at me pleadingly for help so I confiscated the bone from Wawa, locked him out and allowed Coco to chew to her satisfaction. Or so I thought.