We bought the everlasting treat ball a few weeks ago and have to say Cooper still loves it as much today as when we first got it. We have kongs, and although he likes those he looses interest in them pretty fast. The everlasting ball comes with 2 treats, but you can buy the refillable treats (in my area they are $4.99 for a 2 pack) which seemed a little pricey but he will play with it for an hour or 2 at a time.....it keeps him very busy. Once he then gets tuckered out, I put it up and bring it back out the next day. I just wanted to pass this along, because this really keeps his little mind busy and does not get bored with it. Below is a link of what the toy looks like.
Star Mark Everlasting Treat Ball for Dogs - Toys - Dog - PetSmart 
