you might want to try giving some polyvisol baby vitamins without iron, vita.E,and poultry vitamin B,and a very small amount of selenium. (large quantities can be toxic) See if you get any improvement with the vitamins. some times a vitamin defiency can cause the lack of coordination, inability to walk, can even cause birds to do flips.Giving those vitamins can't hurt. it takes about a month for full recovery if it's a deficiency. Mareks disease can also cause those symptoms. was she vaccinated for Mareks as a chick? I'd try the vitamins, if there wasn't any improvement I might consider that Mareks could be a possibility.