What do you think about the idea of moving 3 week old chicks to the coup with the chicken door fixed closed and a 100 watt incandescent white light hanging. Not a heat lamp. the coup is 6 x 6. Right now my brooder pen is in a spare room and the dust is unbearable. The night time temps get down to 4 deg with an after noon temp of 10 deg outside. I am going to use a layer of kiln dried sawdust to help insulate the floor (not cedar). Is it to early to put them outside? i have read a lot of mixed reviews and just wanted to ask a pro. The chicks were born on the 1st of March.