This morning my bantam cochin who is 3+ years old suddenly couldn't stand. She could barely move at all, frequently falling and rolling then getting stuck on her side or back. Then after lying there for a bit she seemed to be fine and began walking on her own. Then the symptoms returned. She has a chick right now that hatched about 6 weeks ago. The chick seems fine. I had a chicken display these same symptoms a year ago then die. Nothing since then or before. Yesterday she was totally normal. Any ideas what this could be? Thank you!