The UFO Maze SPIN bowls, level, TRICKY, by PetDreamHouse are dynamic slow-feed pet bowls that turn mealtime for your dog or cat into fun and interactive feeding. SPIN bowls encourage sniffing, licking, and problem-solving during meals, which naturally slow eating and prevent choking, bloating, and excessively fast eating. Each bowl has a multi-functional center puzzle element that can be adjusted in height and resistance to offer variation. Each bowl has four large anti-skid rings to provide high stability.