Peter

Thanks for that advice Peter, I suspect, if we can find a willing farmer, it will have to be me doing the "de-training", I'm not sure my Sister is strong willed enough to carry it through! As far as I know, he didn't draw blood, but I wasn't able to check out the whole flock, he didn't seem to have any blood on his mouth when I finally managed to secure him, but he had been chasing them for about 20 mins. I took him past the field today, on a lead, and shouted "Ware Sheep" at him every time he as much as looked at them, but your method sounds much better. Wish me luck!