How about while riding a horse that's already feeling skittery cause of the crisp cold, then a pheasant breaks right out from under you? Impromptu rodeoApples to Oranges......
......chickens aren't humans....and humans don't wear custom grown down coats 24/7.
But every keeper must do what ever makes them feel comfortable in their minds.
x2 I considered the heat/no heat situation quite seriously. The deciding factor for me was that chickens have been arround 5, 10, 30, whatever, thousand years without any
external heat source. They are doing better than me. And who hasn't jumped a grouse or pheasant @ 0 degrees?