I have 3 beautiful Buff Orpingtons, Margo, Edith and Agnes. They are all 10 1/2 months old. They are healthy & they eat well. Two of them lay every other day, even in our bitter cold. Margo, the largest hasn't layed yet as far as I know. They love to be petted and show no signs that something is wrong. They don't have frostbite but I have noticed that their combs are not as bright as they were. Is this normal for the cold weather, or do you think something is wrong? They love the outside even when it is quite chilly. Their whole run is enclosed with plastic sheeting to keep out the snow and wind. Should I be doing something different for them? This is our first winter with our girls, so any and all suggestions would be appreciated!