We are somewhat new chicken owners. We are on our first flock and are "hooked"! We have 3 New Hampshire Reds and 3 Hybrid Sex-linked. Sorry, I don't know much about the hybrids. They are all 2 years old now. One of the hybrids is obviously sick and distressed. She has been looking "poorly" all winter. I first noticed the feathers on her backend looking sort of thin. The feathers were not coming out like they might if she were molting, but the feathers themselves were thin and she seemed sort of lethargic. The last few days she has adopted this sort of squatting posture and seems much worse. I've attached a picture of her and am hoping someone can help. None of the other chickens seem to be affected by this ailment.