I live in Central ohio, me and my husband are putting the final pieces to our chicken house, we cant decide if we need to insulate the walls and celling or not. the house is well built, with ventilation at the roof line and a window and a thin wooden human door. we have already put 2 ft of plywood on the inside walls, so the outer wall wont rot and plan to paint it. we plan to put cocking on any drafty areas. it can get pretty cold in the winter, jan. and feb. with little sun shine. so what do you think will my chickens be ok or should i insulate?