And remember sometimes its worth seperating wilder sheep from the main flock for a month or two to tame them:
I recently brought a flock that contained 2 very wild, primitive type hebs, which had been drafted from a fell flock - lovely grey, longish necks and feral as hell. they Live as a pair and their safe distance from me is about 100m.....
They are seperate now until they tame up - as when they ran, EVERYTHING went with them, under fences, over gates, into hedges.... if these two run like hell they all figure something must be up.
Once a few get used to you, the rest follow.