Last year was my first winter with chickens. I'm in Ohio, so we get lots of snow and frigid temps, along with wind. I covered my run with tarps from top to bottom, and I put a light out in the run. It's almost dark when I get home from work at 5pm, so they didn't get to free range much.
On the weekends, when I normally let them free range all day, they didn't want to come out if there was snow on the ground. They were terrified of it! So I didn't force the issue. But having the run enclosed like I did, really made the coop seem twice as big, because I put straw in the run, and I had some things for them to climb on.......
This year, I have a real roof on the run, not tarps, which sag and leak and I had to go out with the broom and sweep the snow off of the roof because Ohio really got hammered with snow last year.
I have a better, bigger coop, and the run will be covered with tarps on the sides to block the wind, so I'm hoping the chickens will be happy. I've got things out there to keep them from getting bored.......
I wish it could be fall all year long.......