See reviews @ http://www.amazon.com/gp/product/B0018CG40O?&tag=greendaydaily-20
Your cat loves to play, hunt, and eat. The MultiVet SlimCat Food Distributor Ball lets your pet do all three at the same time. Just fill the SlimCat with .67 cup of dry cat food. Adjust the hole in the SlimCat to let one piece of food pass through easily. As your cat chases and bats the SlimCat around the room, one piece of food at a time will exit the ball. This allows you to control how fast your pet eats and provide him with hours of stimulating play. Small portions several times a day will improve his digestion. The SlimCat also satisfies your cat’s inherent need to hunt. Solve your cat’s behavioral problems by enriching and satisfying his environmental needs through exercise. Wash the FDA-approved plastic SlimCat in your dishwasher or with hot soapy water. Safe for cats of all breeds, ages, and sizes.