I'm wondering as I modify the 8x8 walk in coop from "...for Dummies" if I should leave the egg door out of my design. I realize it's a convenience thing but in a very cold winter climate (like mine) and a potentially windy location (like mine is) could I run into draft issues for my girls? Is it really a lot more work walking through the door? I feel very fortunate to ask these things before I build! Thanks.