My young hen tilts her head to the right when she's looking around. She also seems dizzy and unstable. No signs of injury, swelling or infection. She eats and drinks fine. Could she possibly be blind in the one eye? I noticed the head tilt a few weeks ago now I noticed the unsuitably. The others in the flock are fine. She has always been a loner and doesn't hang out with the others. They will pick on her sometimes. Any thoughts?