I am new to chickens but have been reading up as much as I can. I bought a coop this summer but modified it to be up off the ground. I am just realizing that my bright idea of putting mesh on the bottom so the poop would fall out underneath was better in theory than reality. Now that winter is coming I'm going to have to put linoleum down to cut out the draft. My question for you all is, does my coop have to have a door? The coop, up until now, has been open into the run at all times. I have never locked them in because the run is secure enough that I don't need to. I live in Utah so winters get pretty cold, if I keep the door open is it going to create too much of a draft? thanks for you advice!