Help! 9 week chicks eye closed

[Renn]

Needing some help! My most out going chick, a 9 week old ameracauna mix, has suddenly started squinting its eye half shut. That was late last night and early this morning, today its progressed into keeping that same eye fully shut and mostly just laying around when normally she is right up at the fence to see me. She is defienetly acting differently. I opened her and and could see nothing physically wrong, and no nasal discharge or sneezing, anyone have any idea what could be going on or what I can do? Thanks

 

[Renn]

Bumping for some help. She is keeping her eye completely closed and not moving from the back of the pen at all. Normally she is running to see me.