CALHNNA Smart Dog Puzzle Toy The CALHNNA Smart Dog Puzzle Toy ($18, originally $19) is a helpful slow feeding toy that assists with the digestion of your puppies and small-to-medium-sized dogs. Designed using eye-catching colours in your pup's spectrum, it's sure to capture their attention. Image Source: amazon.com CALHNNA Smart Dog Puzzle Toy $18 from amazon.com Buy Now