I am designing my coop. (Im an engineer so everything must be drawn 12 times before I decide what I am going to do) I see many coops that are fairly tall 4-5'. I was thinking of going shorter. Build the coop with outside dimensions of: 4'x4' of floor space with the roof being 2.5' tall in the front, and 2' tall in the rear. with nest boxes hanging outside. Will this be tall enough? roughly 1.75' of headroom in the coop? would making the whole thing a half foot taller gain me much? or should I make lean towards an entire foot taller? Being in Mass, I want to keep the roof as low as possible to keep the birds warm when the temps dip and the storms roll in.