My Rhode Island Red is about 9 months old, and is just sitting down in the run, she can walk, but just sits in the dirt and does not peck around. I looked at her vent could not see anything unusual, but have no idea what to look for. She does not seem to have runny eyes, or is completly lethargic, she has lost a few feathers, but all the chickens lost a few before I put the winter lights up last week. I have 8 chickens with a coop and an enclosed run. Because they all share a coop and a run, and my run is outside and mostly uncovered, I have no idea about her poop. I have no idea how to diagnose her, or how to treat her. Any suggestions?