I'm not sure i agree with you Moll. Granted, my lad is worked in all weathers, on some pretty rough terrian, and asked to face some harsh cover and obstacles, and he never backs down. But if he collides with something sharp, or just bounces off / over barbed wire, he usually walks away with some nasty skin tears, in the last 12 months, he has had four trips to the vets to be sewn back together.
He is however i total nut job.