My coop I am building will set about 2 feet off the ground. Do I need a ramp or can chickens fly up and down to get in and out. Also I live in Kansas and it can get cold in the winter, but we have very not summers. Sould I insulate or not? Some say do some say don't. Last would anyone recommend a droppings box under the roost. If so can I maybe get some suggestions or pics.