The girls are 4 weeks.. it is in the 90s-100, with nights in the 70s. Expected to stay this way for anther 10 days at least. The heat lamp in the garage has been off for a week. Waht are yout thoughts on moving them to an outside brooder/ rubber trough to get some fresh air? there are 10 of them. and I would like to see them separated for another 3 to 4 weeks before joining the main flock.