Okay so I have 4 hens, all 13 months old. I noticed my Black Sex Link, Rosie, is acting a little strange. I had a hen die from egg binding about 5 months ago, she wasn't eating or drinking or moving. Rosie isn't really moving much, but when I bring food to the fence, she runs up to get some. She's running a little different than she usually does though. She also seems to be a little bunched up. Do you know what this is??