I have 5 baby chicks. I would guess they are 3-4 weeks old. Until now I have kept them in the garage where it is warm with a light on them. Now they are feathering out a bit, and seemed to avoid the heat light, so i keep it off now, but it is still very warm in the garage. I don't want to overheat them, but i don't want to put them outside before they are ready. I lost one chick not long ago because I think I had it outside too early. Any suggestions on when they can go in a small intermediate run?