My four wheeled coop is the Thomas model from rootscoopsandmore.com. My five girls are very comfy and there is room for up to three more hens. Time to shop? The coop's hinged roof and linoleum floor makes it easy to clean and the metal roofing helps the snow slide right off. I've leaned two sliding glass shower doors up against the coop to give the girls a "solarium" to enjoy where they can be out of the direct rain or snow when they choose to venture out. The wheels are high enough so the girls can go underneath the coop to get to the pan of wood ashes placed under there and give themselves a thorough dusting.