The players try to drive home the sheep by using their dogs. They have to achieve this before the shepherd completes a pen in the middle of the game area (which is variably set up from tiles, some of which are the sheep). The building speed is determined by the same die that also moves the dogs which can proceed to the next tile of the color that was rolled. As so often with Herder games, players can pass their die results to other players. All players win or lose together (if the pen is completed before the sheep are in). - BoardGameGeek