Chick rubber necked and not walking well

[christinag26]

My 2 month black jersey giant is shaking her head all around and is mostly sitting not really moving to well the other three we bought are fine. What could be wrong?
I'm wondering I when I moved their coop into the bigger coop she fell it sustained a injury she is eating and drinking please

 

[silkiechicken]

Wish I had a suggestion on what is wrong. With vaulted skulled birds, wobbly gait and funny neck craining is often due to a head injury through their unique skulls.