A few weeks ago I noticed my hen laying down a lot. When I approached her, she wouldn't get up. I tried to help her stand but she couldn't. Now she can stand up but she can't walk and her balance is terrible. You can't barely touch her and she almost falls over. However her appetite is good. She is eating and drinking well and her color in her comb is good too. I also checked her feet and they look healthy. If anyone has any ideas as to what may be wrong or something else I can try, it would be much appreciated. Thank you!