I'm new to backyard chickens and this will be my first winter with the girls. I use a modified free range method where I use temporary fencing to give them a large area to chew on. I then reconfigure the fence when they've eaten the area down. I'm in the woods with fox, coons, coyote, hawks, and even bear so I really don't want to just let them roam unattended which is why I don't let them completely free range. BUT, what about winter? There won't be the grass and weeds that we now have. How does this impact their foraging? Do you see an increase in their commercial feed requirements? Or do they find other stuff in winter that I'm not considering? Thanks!