They're 1.5 weeks old. In a very large box for a brooder. In the garage. I have 2 lights in there, so the temp is about 86 under one light and 95 under the other. THey have clean water and chick starter. I had 47, but every other day I find one more dead one in there. I put some hay in there so they'd quit nibbling toes. Hope that's not a problem. The sides of the brooder are 3' tall on one side and 4' tall on 3 sides--not much chance for a draft. What am I missing here? Or do they just do this?