I have had all of my hens cooped up basically since the foliage fell off the trees. They started huddling together in some tall grass and just sitting there until time to go in their coop anyway so I just quit letting them out in the morning. They have 2 nice heat lamps and fresh water every day I am doing the deep litter method and just adding more pine shavings every few days. I have been buying them things like the seed blocks for wild birds that hang just to keep them entertained. I am getting about 10 eggs per day out of 14 hens, so I think health wise they are fine. my coop is 8'x8'x8' with MANY roosts, and 5 externally hung 16"x16" nest boxes so all of the floor space is living room. I turned one hen out for about a half a day a few weeks ago because she went broody and I figured it would break the broodiness to be out for a day and a hawk got her on me (man I wish they where not protected). I am afrid since my girls cannot hide and pickings are slim (winter weather) that the hawks, raccoons, possums, skunks, and foxes would make short work of my flock.