I think I may run into a bit of a problem. I've got 46 chicks, 12 layers and the rest are meat birds. They're nice and warm in a big cardboard box in the house but i know how fast they grow. I don't think i can handle so many in the house after 2 weeks but being up here in the Yukon, I'm worried about the temperture in the chicken house. How warm should the birds be at about 3 weeks old??I'm thinking I better put the heat lamp in there and keep them in a big wooden box.