How to use the Buster Cubes Start the dog playing or eating by rolling the cube across the floor. The dog will use its nose to move the cube and gradually learn how to empty it, or in other words, the dog is rewarded with food or treats the more it plays with the cube. It is of course important to consider the extra nutritional energy intake provided through the cube. Therefore the daily amount of food must be kept at a level corresponding to the dog's needs in order to avoid obesity. As the dog gets more experienced and empties the cube faster, it is possible to increase the level of difficulty and thus maintain the value of the cube. This is done by turning the cylinder towards maximum or minimum respectively in order to adjust the speed at which the food is released during play