Hi, i have three chickens living in a small coop in my backyard. So far this winter (which is my first winter with chickens) they have done fine. Only once did the weather get to -11 and thats the coldest its has gotten. Tomorrow it is expected to get to -20 and lower and there is no way for me to get a heater to my chicken coop. Would it be ok to move them inside at least at night? I was thinking of keeping them in a extra large cage. It is plenty big enough for the three of them. Also if i move them inisde, with this inturupt thier egg laying scheduel or will they forget how to lay in the nesting boxes when i put them back outside? And will they get shocked if they go from staying in a warm house to back out in the cold? Sorry for all the questions but im worried that with only three of them they will not be able to keep warm.