I had one of my SS hens drop dead this morning, & am trying to figure out why. I had 5 SS hens, and all of their combs bleached to pink as soon as it got cold this fall. So I've been concerned about their cold-heartiness. It has been VERY cold - lows near 0 F at night. I assumed since they are good-sized birds with small combs that they would be cold hearty, but now I am wondering. I love these birds but will have to avoid them if they can't handle winter here. Thanks for any feedback.