First off - I feel so lucky to have found this web site - I didn't know I was in the company of so many other chicken owners! I have 30 assorted breeds of hens. 24 of my girls are all just over one year old - one of my Plymouth Rocks for the past 4 days has appeared lethargic, just staying in the coop.. the feathers on her head appear to be receding, showing more of her red crown - her eyes seem a little lazy as well. I have no idea where to begin to help her out. Thank you for any information that can be shared!