This morning when I got up and watched the sheep for about half an hour from my window everything was fine, everyone was grazing and the lambs were playing. About an hour later when dw went to feed all was normal. About 4 hours later the most active ram lamb was dead in the pasture. It was still warm but stiff, and the eyes had already glazed over. Four hours before he had been leaping and romping! This lamb was about 6 weeks old and appeared very healthy. He has been with the flock for about two weeks and there have been no issues. About three weeks earlier I had a ewe with twins in a birthing stall. Both lambs appeared healthy and active. They got daily turnout in a big stall and returned to the birthing stall at night. One morning I went out to feed and one was dead. No apparent reason. The ewe was a good protective mother and the lamb was big and well fed. I've haven't had this happen before, rare lamb deaths at birth, but not when they are this old. Any ideas?