I have a RIR that is about 6 months old. I noticed her wing drooping in the coop last night while they were perched. I thought she was just holding it out because it was hot, and when I touched it to see if she could move it, she pecked me! I just thought she was being her difficult self. This afternoon I noticed her comb was drooped over and she wasn't her spunky self. Upon further observation, I noticed she was ruffling her feathers and was walking a little sideways. Then she just stood still and stared at things, and when she approached me, she turned in circles a couple of times. I tried looking these symptoms up in my Chicken Health Handbook, I saw lots of things with one of these symptoms, but nothing with all of them. She doesn't have diarrhea, or an excess of white on her poop. I have quaranteened her from the other birds, but need ideas on what it could be and how to treat it, if treatable. I have not tried any remedies at this time. She free ranges during the day in our garden. All the spring plants have been fenced off so they won't eat, but I noticed her and my other RRI eating leaves off my tomato plants through the fence this morning. She stays in a coop w/ a roost at night. Please help if you can.