Okay, so the weather this winter has been freakishly cold already, but now they are saying that the highs all week aren't going above 30 degrees and the lows are consistantly to be around 13 degrees. Tennessee doesn't have weather this cold!!!!! My chickens are in three different coops. LF coops have 9 and 10 birds respectively. The banty coop has 12 birds. One LF coop and the banty coop are 4'x4' and are raised about a foot off the ground. The other LF coop is 3'x8' and is raised 2 feet off the ground. None of the coops are insulated and are walled with 1/2" plywood. All have 6-8" of pine shavings on the floor. Windows are covered with clear plastic. There are gaps around the doors and roof though. There is no electricity in the coops and no heat. Will they be okay? The co-op has a heater that attaches to the gas grill propane tank. Should I invest in it and try to position it so that it hits part of all three runs? Is it safe to run 24/7? There is no way to position it so that it would reach all three coops at night and I can't afford to purchase more than one. I don't want the chickies freezing! Will it help to put hot water bottles (aka hot water in milk jugs) in the coops at night? Am I stressing too much?