Sometimes I go and help out on a sheep farm. They have milk sheep and grazing sheep, the latter graze the dykes along the rivers here in Belgium. So these sheep have no fixed field there, we place sheep nets and move them around so they keep the dykes neatly without disturbing the fauna and flora. But in autumn, the sheep must leave the dykes and so we move them to other fields nearby until there's no more grass and then they come home.
The last weeks we moved several little flocks of sheep to a few fields where they stay together until winter comes. Jessie has become a great help, she has gained experience by doing practical work whenever we could help out on the farm. How wonderful to see your dog has become a "useful dog"!
A little flock of ewe lambs going to a new field:
A bigger flock of older ewes with a few little lambs going to another field: