I just brought home 26 meaties this morning and all is going well so far. the coop has been separated into 2 sections with a chicken wire wall so there is lots of ventilation one side for 6 layers and the other side for the chicks brooding area. the coop has 2 windows one on each side and I think the one with the chicks should be closed at night ( we do live in Canada and it cools off at night) but dh thinks its ok left open. So far the temp has dropped from 90 to 80 and its a while until the sun comes up. Should we lower the heat lamp or shut the window?