Im starting out with a 8X4 floor. Im going to have 6 or 8 chickens. How tall do I need to make the coop? I was thinking big enough for me to stand in there, but it would be better for the birds in the winter time to have a smaller space that would be easier for them to keep warm. Not to mention cheaper for me to build, Also we get some nasty wind, and Id rather have less building to catch onto the wind.