This is my first experience with chickens, and so far I'm really enjoying it, but I have to admit I'm second guessing my decision to have them, winter really stinks. First of all I only have two, and I wonder if they're adequately keeping each other warm enough. We just had a nasty cold spell, with lows around 15, they made it, but I'm worried about when "real" winter sets in and stays for four months. My coop is elevated about two feet off the ground, insulated floor and walls, but not the roof, which I'm kicking myself for. I also have a thin layer of dirt on the floor and about four inches of pine shavings, I clean it daily to keep the humidity down, I believe the ventilation is good and it doesn't appear to be drafty. I have a digital thermometer with the base in the house and the sensor in the coop. What bothers me, is during the cold spell, the temperature in the coop was usually the same as the outside to around 3 degrees warmer, which tells me I'm doing something wrong. I don't use artificial lighting or heating and didn't really plan on it, from what I've read it doesn't seem like a good idea. I don't use the deep litter method, mostly because I don't really understand it and the coop seems too small for it. Am I nuts? I think my hens are a hoot, they're sweet and friendly and one just started laying adorable brown eggs for me. I just want to do right by them. Am I doing something wrong? sorry for whining, any advice?