I went back the next night and hung around occasionaly calling but it turned out she was wise to the call and on dark I noticed her going away only to stop in the distance to listen to a squeal or two and then continue on her way.
I left her alone Tuesday but returned today about 5pm and waited silently.
About 6 she appeared and approached cautiously, I was on a regular route that leads to a bridge they use to cross a river! She hid her self from my position at about 100yds in a ditch but the lambs were betraying her! She waited for half an hour to make sure all was well and then got out the ditch and made straight for me!
At 40yards she stopped possibly sensing my movement. The long levergun sights held on her chest untill the trigger dropped the hammer and the FMJ FP raked front to back,,,,instant and clean the job was done.

In the photo you can see how the slug just grazed her left top lip!
Nath.