Didn't get a chance to play this, but some trainer had two (sheepdogs?) I think and let one play at a time with the crowd. The game was simple. There was a circle of rope in a radius and the dog tried to knock it out of the circle and the people around it tried to keep it in the circle. My old dog Zelda would have liked a game like that, if she was not stubborn enough to make her own rules to everything... I tried to her fetch, but she thought it was a game of "take it from me! If you can!".