This is Dee my Easter Egger Bantam. She is 2 years old. She has been doing this stumbling walk for the past 3-4wks. She eats and drinks. She can fly up into the coop. Checked her for mites, no mites. Also her poop looks normal- no worms noted. I feed my layer hens organic layer crumble. My other 5 chickens have been sharing the same coop and show no similar symptoms. At worst I was thinking Marek's? Or is there a vitamin deficiency? Any ideas welcome. I have separated her for observation.