We only keep a few hens for our own eggs these days. They had a whole 'horse' stall 12 by 12 feet. We need younger hens and to prevent them all fighting, one project this Spring is to make separate pens for each little flock. Each pen has an elevated floor made of plastic panels to allow manure to fall down below.The idea is to keep the chickens and eggs cleaner. Each pen has its own small door to the run outside so we can rotate days on pasture.