【Funny Slow Feeder Toy】: Fill with your cat’s favorite treats or food, this unique tumbler shape toy will arise your cats’ interest and attract them to move the ball to get the treat, encouraging healthy activity and feeding. 【Durable & Safe】: Made of high quality ABS and PC material, with smooth surface, this toy is durable, bite-resistant and mouth-friendly. The clear cover makes food visible and appealing for your cats. 【Adjustable Cat Feeder Toy】: Adjustable levels of feeding difficulty that you can just slide dial to adjust the size of 1-2 holes, adding more fun for your cats’ eating and training your dog physically and mentally. 【SAFE & DURABLE】 :The maximum diameter of the food dispensing hole can be adjusted to 0.78inch, the added food should be smaller than this diameter, or the food can be cut a little smaller then put it in. Note : Please put dry granulated food instead of sticky food. 【Funny & Beneficial】: Dual rolling balls design, makes your feline friends happy playing