I seem to have found these Big Horn Sheep during nap time. This was at the Calgary Zoo; their enclosure is set up to be similar to the Rocky Mountains from which they hail. They were all lying down enjoying a peaceful day, and anytime I was able to get a closer look, their eyes were either closed or really droopy. It makes me feel relaxed and sleepy just looking at them even now. This was also during the end of winter moving to spring, and their coats had changed color from white to brown, getting ready for the warmer weather to come.