Challenge dogs and ease their boredom with the Treat Puzzler Ball dog toy (formerly called the Amaze A Ball). This tough ball is made of 100% natural, certified non-toxic rubber for great bounce and has a "maze" inside it. Just put treats or kibble inside one end of the ball. As your dog rolls and bounces the Treat Puzzler Ball, the treats work their way through the maze and finally come out from the other end. Entertains and stimulates dogs for hours of play. Because they are made from rubber, the Treat Puzzler Ballhas more movement and action than other treat-dispensing dog toys. Size is 4" diameter with 1" treat hole. Available in assorted colors; please allow us to choose for you.