A sheepfold was a walled enclosure made of stones. Several flocks of sheep were kept in the sheepfold, and when a legitimate shepherd came to get his flock, the doorkeeper or watchman of the fold would let the shepherd pass into the fold. The shepherd would call the sheep, and the sheep, who knew his voice, would come to him, and he would lead his flock out to pasture. When they were away from the sheepfold, the shepherd would stay out all night with his flock, finding some kind of shelter in the pasture area, and he himself would act as the door, so that no wild animal could get by him.