My hen "Dixie" won't stand on her right leg today. She was on the roost and I went to pick her up and pet her, when I put her back down she couldn't get the roost and fell to the ground. I had no idea that she couldn't stand on her right leg. I have her separated with food and water close by. She's been laying outside on the ground since her molt a week ago but she was going back in at night to roost. Now today she is laying on the ground in heavy shavings. She has her toes curled up and under herself. When I straighten them and make her stand on it she just lets her wing come out to balance and lays back down. Her appetite is good, she is 17 months old. Buff Orpington that stopped laying recently. Any ideas what this could be?? What should I do??