All traction avant but the pics look older.
The caterpillar car could do with some super tuning re position of the feed.
I have observed the treadmills in pet shops. Some have open tread bars and amazingly at a fast run the the rear feet, out of view, collect the bars, even when the drum develops a rapid speed oscillation.
I guess the mice develop reflexes for the taxing conditions. Like Seven drivers
And, like them, they seem to enjoy it.