There seems to be a theme around that REAL chicken farmers (at least ones not raising 100,000 birds) would NEVER build a brand-new chicken coop--the tradition is to repurpose whatever is handy, from a shed to a school bus!
I'm heavily involved in the railroad preservation field, and a common theme there is the rescue and restoration of old railroad car or trolley/streetcar bodies that were adaptively reused decades ago as farm storage shed, guest houses, hunting cabins, or--YES--
chicken coops!
It is believed hundreds, if not thousands, of streetcars/trolleys nationwide were purchased by farmers as trolley companies went out of business and liquidated from the 1920s through the 1950s, and a great many of them were wooden-bodied cars with little or no scrap value. So car bodies, minus the wheelsets with motors, were sold for a few bucks and trucked out to the farm, to be set up as a cheap chicken coop with windows and a door or two. Obviously, this practice was more common in warmer climates than snowy ones, as the windows offered little insulation. On occasion, if no trolley companies were nearby, a wooden boxcar or caboose could be bought from a local railroad instead.
Decades later, as rail enthusiasts started the active preservation of railroad equipment at railroad and trolley museums nationwide, many of these car bodies would be rescued and restored for either static display or operation. The repatriation of such equipment became so common that the term "chicken coop" came to be used for any such carbody rescued from an adaptive-reuse situation, whether the car served as a guest house or a diner or actually housed chickens at one point.
Here is an example of one such car, a carbody from a Tacoma, Washington system later stored at a railroad shop in Washington State pending restoration:
https://railroadforums.com/forum/index.php?media/byrons-chicken-coop.4366/