I debated for several weeks on whether to heat our coop or not. I had had two egg-bound chickens because of the extremely cold temperatures, but according to several web sites and a couple of articles I had read in Mother Earth News, chickens can withstand very cold temps if given adequate shelter. I changed my mind after an unfortunate incident involving our rooster, Ronald.
My husband suggested a hair dryer, but I did not really want to tangle with a large, frightened roo in our little bathroom. I could just picture feathers flying, spurs wielded, wings flapping...so I came up with the brilliant plan to keep Ron in a large box in the kitchen overnight to thaw.