Most people don’t know that the treadmill was invented in the 19th century as a means of punishment, and was used in prisons until a judge ruled it cruel and unusual.
But here are cats finding all sorts of inventive ways to use a treadmill, all of them much more fun than anything a human might do with it.
That is probably why they don’t sentence cats to prison.
I’ve also seen unpowered treadmills made for cats. I’d love to try one for my cat, but I’m not sure she’ll actually use it.