I know this is way early but as my chicks are maturing I am thinking we have more roos than pullets. Since we are in a fairly populated are I am not sure will keep even one Rooster and definitely not the 4 or 5 I fear we may have(out of 6 American Bresse Mix). So since we have only 2 other chickens...6 month old hens(New Hampshire Red mix)... I am wondering if I need to get a few more hens to keep the coop warm enough this winter. The coop is about 6 foot by 4 foot. probably about 4 feet high slanted down to 2 feet if that makes sense. It's built a couple feet off the ground. They will have a small 8x6 covered run available during the day and I plan to insulate but no light or heat. Oh And I live in the Northern part of lower Michigan so it can get down to single digits or even negative numbers sometimes! I am not worried about eggs just the chickens keeping warm. Any Advice?