- Educational dog toy - Rotating compartments to release treats - Unique design for greater difficulty (Diameter 24.5cm) All dogs need to work out physically, but sometimes we forget that they also need to work out mentally. Several tips exist to overcome this problem, in particular intelligence games. How does it work? This intelligence tray is equipped with several compartments for treats or kibble, which your dog will have to push to make them pass over the holes to retrieve them.