They did do well. I had some very mild frostbite when we went down to -17F. But I have a large fully secured covered run that I wrapped with tarps that they hung out in most of the winter. They would still venture out in the paths I shoveled in the snow for them. Even the WLHs that people say are not cold tolerant did just fine.Oh wow!! What a beautiful flock you have. They do well in the winter?