Barred Rock unsteady on her feet

[VTchickens]

My 8 week old Barred Rock was fine yesterday and today was sitting in the coop when I let the other chickens out into their pen. I initially though that there was something wrong with her legs but they are fine. She gets up, takes a few steps, wobbles and then lays down. She has been drinking although seems to be having trouble seeing the food - she almost pecks the air. All of the other 26 chickens are fine and she is the only one with an issue. Her comb is a good color although I have not seen the color of her poop. My finace did go feed the bunch some leftover peppers and strawberries (tops of the fruit and vegs - some jalapenos too) and she seemed fine at that time. Just overnight these symptoms. All of the chicks were vaccinated when we got them. I certainly appreciate any help or advice.