My first trainer a looong time ago had several World titles in Working Cow Horse. The 2 and 3 year olds he bred he would "test" them to do this. If they worked the cow by instinct he kept them and trained them...if they didn't he would sell them. It was the coolest thing ever to watch.
Awesome. I've often watched cutting videos and thought that the rider was, well, only along for the ride. Of course, that's not true, but this video definitely shows how it's a real team effort.