XSp.

In a not so distant future, hamsters improved their exercise wheels becoming super-hamsters.
Cats fell way behind, after years of lazyness, eventually became powerless against rodents in general.
So they felt they had to do something about it, since even dogs where shaping up themselves.

Hence, cometh the catxercise wheel! 😛

From I Can Has Cheezburger YouTube Channel.
Also visit I Can Has Cheezburger website!