Thank you for all your help with my earlier questions on this forum. I live in Northern Illinois and I am starting to think about winter. I currently have three female Coturnix quail living in a rabbit hutch outside. It has a tray underneath and three exterior walls, with an interior divider such that one third has four walls and a wood floor and two thirds has wire floor and a wire front. It is against a six foot solid fence and faces east; the prevailing wind comes from the west. Please give me some advice: 1) Are three birds sufficient for the winter? Do they need more birds to huddle together? 2) What is the best way to keep water from freezing outside? 3) Should I winter-proof the rabbit hutch in any way? 4) Should I put a curtain of some sort in the "doorway" between the little room and the wire section of the hutch to block the wind? 5) Can they suffocate in a deep snow? If there is a bad snow should I plan on being up all night to shovel them out? Thanks for you help as always!