I'm working on a 4x6 coop for 6 hens, here's a rough drawing. were going to prefab it in sections at my work where i'll have access to all kinds of machinery/tools. This drawing doesn't show a lot of details, but there will be a nesting box added to one of the 4' sides, the 1'x1' chicken door on the opposite 4', a big clean out door on a 6' side and a window and some vents. Before we start cutting wood, can you guys spot any inherent flaws in our design? Thanks!