This is a common food spill toy for cats and dogs. The original design has an adjustable spill hole. You can choose 1 hole or 2 holes for food leakage to control the food leakage speed of the food spill toy. . The design is not inverted, so that the dog is more interested when playing with the product. With a light push, snacks will be leaked during the swing of the product. Daily use can improve the dog's IQ.