Throw toy against the spine and it bounces normally. When your dog thinks he knows where its going to bounce, throw it against the opening to create an unpredictable bounce that's hours of fun.
Bionic toys are fun and engineered to withstand the play patterns of even the most aggressive chewers. Products are made from a proprietary material called Bionic Rubber which is made from FDA Food Grade materials. Bionic Rubber floats and is dishwasher safe and 100% recyclable.
Bounce against (hole edges) openings for unpredictable bounce