Hi all, I just finished my coop and put my chicks out for the first time. They've been living in a 3'x1.5' tuperware box and they were ecstatic to have all that room to play in. However, I'm worried about the younger chicks. I have 8 chicks that are just over three weeks old but I also have three that are just over a week and a half old (though they are alsmost the size of the big ones!). I have two 250 watt heat lamps about 18 inches off the ground and the coop is 8x4 and insulated, but it's going to get into the 30s tonight. So far I haven't seen them sleeping so I don't know if they'll be hudling under the lamps. They've been busy running around, jumping, flying, chest bumping, taking dust baths int he corner sand box and looking for the worm treats I toss at them. Will the younger ones be okay or should I bring them in for the night?