One of my 6 month old RIR hens has had weak shakey legs for over a month now. I have posted this topic before but thought I would try again. She has trouble walking and getting up and down. She is still eating and drinking just fine. She was still laying up to a week ago but I am not sure now. Her color is fine and her wings flap in unison when she is falling. Her neck is also moving fine. She was vaccinated before I got her. I have been giving her electrolytes and vitamins. She is not getting any better and her legs seem to be getting weaker. Any thoughts on what this could be?