Rotating 4 Layer Slow Feeder Bowl for DogsThis slow feeder bowl has 3 difficulty levels for you to train your dog. The center of the toy has a squeaker, which your dog can press to remind you to add food![Difficulty level 1 play instructions ] Do not remove any locking columns. The carousel is locked, and the dog can only get to the first level of the carousel and the base of the grain bin in the food. This level is suitable for dogs who have never been used a food puzzle.[Difficulty level 2]