Does anyone have any advice on whether this is a good idea? I live in an area where I would need to keep chicken on the down-low. My back deck is about four feet off the ground and about 10' x 20'. If I built a coop underneath for the hens to roost and lay eggs in, and put lattice around the deck, would the space be sufficient to raise three healthy, happy hens? Would it be too dark and gloomy under there? I'm completely new to raising chickens, but have been reading alot. I don't have any hens yet, but am on the verge of getting two or three. Any thoughts on this would be greatly appreciated.