Chicken falling backwards/loss of balance

[Jcorvin]

Eating, drinking. Backing ear into corner and pooping. Hasn’t laid an egg in about a week. I brought her inside away from the others a couple days ago. Very wobbly and no balance. I’ve tried eggs, poultry cell, nutridrench but she isn’t interested. Any ideas? She’s roughly 2 years

 

[nuthatched]

What's her diet?

 

[Jcorvin]

Layer feed, chicken scratch