Hi, I had a vision of a small to medium coop in my head. But I always start off small and eventually by the time I'm done go way overboard. So what Im getting at is, I originally just wanted to build a coop a couple feet of the ground with a floor area of 6x4. Then I started wanting to build a larger coop about 7' height and a floor plan of 4x8.Im only looking to keep around 10 bantams .But I live in the North East and it gets cold up here in the winters. Will the bantams be better off keeping the smaller coop warmer in the winter than a larger one? I will use a heating element when it is extreme.