Hi, Newbie here with 3 chickens about 3-4 years old. Yesterday the Arcana developed an odd illness that all my internet searches do not match. Maybe someone here can help. 2 days ago when coming down the ramp from the coop she crashed head first into the ground and stayed there motionless. I picked her up and set her outside where she stumbled and used her spread wings to keep from keeling over. I put her back up in the coop because one of her sisters was starting to peck at her. An hour later I put her out in the yard and all was fine and she ate food. This morning when opening the coop she was down below tucked in a corner and looked dead. I picked her up and placed her by the food and she ate and seemed normal. Close examination reveals no pests, no swelling, no eye secretions, no scabbing, no odd breathing but her face is pale and she has very little comb. Usually she would put up quite a fuss being held but not now. Hopefully someone knows what the ailment and cure is. Thank you.