I am convinced that an exercise wheel is going to be a necessity for one of my kits for her sanity and ours.Btw, Morty is now going to the wheel continually throughout each day, on his own and loving it. It's like he can't get enough and making up for 17 years without one! Yes, I had thought about getting one for Morty years ago, but didn't think he'd use it. Boy was I wrong! Proves it's not just for Bengals!