One of my chickens is not looking so hot compared to the others. She has yellowed around her ears, her comn is pale/dry looking, and her feathers aren't looking hot either. I did find some excess feathers on the poop hammock though, so it makes me wonder if it's molt or if she's sick? This would be the first since her teenager chicken times (got in April, it's now December, so 8 months old). It is winter and we have had some extremely cold weather in Michigan so I'm wondering if she isn't handling it as well as the others. She is acting normal, eating, running around, playing chicken, etc. Thanks!