He was about 2 years old, and I found him laying in the back of the chicken tractor, with his favorite hen standing guard next to his body My kids are so sad. Normally we try to have the tractors in the shade on hot days, but today it was in the sun (although covered & completely self-shaded). I could find no sign of trauma to his body anywhere, today's high was 97 degrees. Do you think that was it? We have friends with many chickens in tractors that are always in the full sun-but I'm rethinking ever having them in the sun during the summer again. The grass in our shaded area is limited, which is the reason we had pulled them out to fresh pasture.