I once rescued a BC who was from working stock and would have made a brilliant working dog. You only had to say sheep (or occasionally sheet if she misheard) and she would be at the door ready. Open the door and she would chase the sheep up the drive to the gates, then sit and watch to amke sure it didn't come back.
I once saw her lying on the lawn, nose to nose with a young sheep. As soon as I gave her the word she was off.
I had more than one offer for her from, people who keep sheep.