The only thing I do different in feeding in the wintertime is that I give them more "treats" in the coop cos the weather here tends to get nasty, and they won't go outside.
I throw BOSS in the bedding to give them somethign to look for, add a bit of corn to their pellets, and hang cabbages from the celing etc to keep from boredom. I get the alfalfa compressed hay blocks and let them sit in hot water to soften, and mix with hot mash in the afternoon as a treat. Last year it got to about 5 degrees at night...very unusual!! So i made sure they had plenty of warm foods and treats...they love warm oatmeal, or crumbles made into a warm mash, mashed potatoes with shredded veggies, whole apples, etc.
Really tho, its the same food/treats they get year round, just inside the coop and sometimes made a bit warmer to get them interested. They won't play with toys, (at least mine wont), so food is a good way to combat the boredom! They always have access to outside tho so they can go out if they want to <If I deem it safe enough to open their door that is>.
