So I'm in coastal Maine where the winter weather is not as severe as it is up north and inland, but can still get down to 10 below or less, with a couple of stretches of a week or more where the highs won't go above 20-25. As far as their combs, all my birds are good for winter -- BO, BR, WW and red and black sexlinks. All but the sexlinks are loose-feathered birds, so they'll be fine as far as the temps. The sexlinks are of more concern. I'm sure they'll be fine, but wondering how I might change/supplement their feed to ease any stress from the cold. But what would I add, protein or carbs, to let them make more metabolic heat for themselves? Most layer feeds are 16% protein, I've found one from Blue Seal that is 17%. If protein would help I could mix the layer feed with something of higher protein. If carbs are the answer, I could add cracked corn or scratch to the layer feed. Could go either way, supplementing either with oyster shell to keep the calcium up in either case. Thoughts?