What do you think will happen when your elecricity goes out?Your birds are in a nice warm coop and out goes the electricity.This warmth you have provided for your birds has slowed down or even stopped your birds from producing the down that keeps them warm.With no down to keep them warm without the heat,they make not make very long.Birds will climatize to any climate,just give them a shelter to get out of the drafts and they will be fine.Remember to give them a round perch so that when they sit down at night their toes will be tucked under them.At least a 3" round perch is good,but the bigger the better.My pens are completely covered on the top and I poly all the sides for the winter months.The poly keeps the drafts out and lets the sunlight in.
In N.H.,Tony.