We live off grid in Montana about 12 miles from any electricity. Last week it was -30 here for several days in a row. We lost one chicken and one duck, the other 50 odd poultry are fine. Our coop is well insulated and draft free. But- I think -30 is a little much for them. I would like to find a way to supplement a little heat when it gets that low. Also, it would be nice to not have their water freeze solid in 10 minutes Anyone use a propane heater? Do any of them come with a thermostat? Safety issues? It would have to be hung from ceiling, wouldnt that defeat the purpose since heat rises? Advice please!