I just put my pullets out in their new coop on Saturday. It has been around 70 during the day and gets down to mid to upper 40's overnight. I have a thermometer in the coop and it says it is about 62 in there when I open the pop door in the mornings. My question is, they have all 4 been sleeping in one of the nest boxes. Should I block these off and not let them sleep in there. I know they are huddled in there to stay warm, but is this bad to let them get in the habit of sleeping in there for later on when they will start to lay? They are also pooping in there as chickens do.