Everyone playing stands at one end of a play area and is blindfolded and spun around. At the other end of the play area a person stands with a whistle. The sheep start to move off on hearing the first blow of the whistle. They have to walk towards the person with the whistle, who blows it to get the sheep to change direction, two whistles for forward, three whistles for turn left and four whistles for turn right. Once players make it to the person with the whistle they can take off their blindfolds. It can be made harder by leaving short gaps between whislte blows as some players may turn in the wrong direction, as they turn to early.
Source: From the original site.(Submitted by: Tammy)