X2Aside from the danger of fire, or even asphixiation from faulty ventilation for gas heaters,
IMHO, the problem with adding heat to a coop is what happens to the birds when the power goes out, or the heater fails in the middle of the coldest night of the year? Because, yes, that is when problems develop. It is Murphy's Law.
Birds that live in an unheated coop can deal with the cold temps, but birds that are not acclimated to the cold will suffer if they suddenly lose their heat source.
I would like to add that if given supplemental heat, the birds do not fully feather out , so it is a douple whammy if the heat goes out..
wyo

