I placed my waterer just outside my coop last winter. 48 hours later some Wyandottes had not gone out to get a drink. They might be cold hardy, but they sure do not like to go out in the cold or snow. I now keep a waterer in the coop at all times. Can you place food and water in the coop just during the day when it is coldest/windyest?
that made me smile. I'm glad my Wyandotte isn't alone in her fussiness about the cold. I was thinking I might've gotten myself an oddball GLW.