Ok, my chicks are in their new baby tractor. The first day out, the shade moved and I went out to move them. I noticed one kept falling on one leg. Then I noticed that they were all panting. So I got them out of the sun right away. It was pretty hot out that day. They have been in the shade since and I even have a tarp hung up in case any of their shade moves and I am not out there. Today I went out to "play" with them a bit and I moved the tarp. The sun came in just a bit. The day is not even that scorching at all. It could not have over heated this chick that fast. The minute he was in the sunny spot, his left leg caved in again. He fell on his side. I took the sun away and he was fine. So clueless. Could the sun be hurting his eyes? I did a search and couldn't find anything on here. Thanks.