my booder is outside in an insulated coop. I had one heat lamp in there, and it's gotten as high a 103 deg and has always run kinda on the high side. Today the weather turned cold, snow and everything. Temp got down to 68 deg. I put out another heat lamp, but it's already down to 78 as the sun goes down. These little girls are nearly 3 weeks old. Do you think they will be ok through the night?