I have 17 chicks that are 12 days old. As I can now see I built the brooder to small, 2'x4'. I have an attached coop, cage that is 4'x4'x6' that is part of the outside coop. I can put a couple 200 watt heat lamps in there that will bring the temps up to the 70's a couple feet off the floor and still keep the floor temps around 90 + or-. The birds will last maybe another week before room becomes a problem.There is already a bunch of jumping and short tempers. Will the heat be a problem as long as I can keep floor temps around 90? Any other suggestions would be greatly appreciated. rj