The reward ball is held together with velcro and you can make it easier or harder for the dog to reach the treat by attaching the ball tightly with the bottom velcro or the top ones. A smart training aid for advanced fitness or as a target. The candy ball is also a good way to get the dog more interested in toys. Rabbit skin is not the most durable material, but most dogs are crazy about it and can get them to do almost anything to get their paws on this rabbit-covered lotus ball. The rabbit skin has been sewn onto the usual PawsPocket material, so if the dog tears the rabbit skin, the fabric is still left behind.Sizes Mini: approx. 15 cm in unfolded position (approx. 8 cm folded) Small: approx. 18 cm in unfolded position (approx. 10 cm folded) The balls are made by hand in England and size and appearance may vary slightly.