BUSTER Food Cube is an ingenious toy recommended by many animal behaviourists. They can assist in the reduction of separation anxiety and enrich a pet's lifestyle by means of positive stimulation. Fill up the BUSTER Cube with food or treats to stimulate your dog both mentally and physically. The tasty rewards keep your dog entertained for hours. Adjustable levels of difficulty. Made of tough, durable plastic, the Buster Food Cube provides valuable mental stimulation and exercise. Your dog is rewarded when treats fall out and you can vary how easily they are released with a simple twist. Instructions: Put the dry food into the Cube via the opening. Rotate the cube to distribute the food into the various compartments inside. You can adjust the difficulty level by turning the central cylinder in the Buster Cube changing the speed the food is released, so when your dog gets more experienced and empties the cube faster you can increase the difficulty level maintaining the value of the cube.