Studies show there is a correlation between behavioral problems and too much rest and boredom. The BUSTER Food Cube is a simple and ingenious toy for stimulating a dog mentally, helping him to improve concentration skills and motivating him to use up excess energy. Simply place a handful of dry food or treats into the Cube through the opening. When the dog rolls the cube, the dry food falls out and his efforts are instantly rewarded. To vary how easily they fall out, simply twist the cube. Made of tough, durable ABS plastic and available in two sizes and four colors.