It was - 14 deg F when I went out this morning. Fortunately we didn't have as much wind as they predicted. The windchill only got down to -22 deg F. In the barn it was a comfortable 2 deg above 0. All the critters had a fine coat of frost on their coats from all the steamy breath. Other than that everyone came through without a problem.
I heard crowing and general chicken chatter after the sun came up, but I haven't gone to roust them out yet. Didn't want to disturb their warmth.