I need some advice... My 6 chicks are about 7 weeks old and loving being outside as much as possible. We've been bringing them in the house at night because it's been in the mid 20's overnight. During the day it's been a bit cold (30-45) but they've been doing great! My question is, is it too cold for them at night? I have a red heat lamp inside the coop itself, but the coop design is quite drafty!! Would they be okay overnight with outside temps being in the 20's with that heat lamp inside? I have the lamp set far enough away that it doesn't really get warm...just takes the chill off during the really cold winter nights we have.