I believe our coop may be a bit too small for the amount of birds we have. It hasn't been a problem to date because they are not full grown and they are outside all day. With winter in the not too distant future I am getting a little worried. We have 16 chickens: 8 BR, 6 NHR, 2 EE. Our coop is a shed that has been converted and is about 8 x 5. I was wondering, has anyone added a second level in their coop to increase floor space and does that work? The shed is normal height, so I don't see why we couldn't add second and maybe a third level across half the coop. Any ideas? Do chickens require a certain amount of head room as well? Or should we build a whole other coop all together?