What fun! He actually did better than our sheep farmer neighbour when rounding up some of his sheep for shearing. It took 7 of us, including the shearers, to get one group of sheep into the pen.
I have looked at some of Cammy's videos on YouTube (The Sheep Game) and they are good to watch.
There's a local sheep dog trainer near me (actually she trains regular dog agility as well to support herself). It is pretty incredible watching her work!