Lilibet has a closed left eye, any ideas?

[JillElaine]

Hi there,

I noticed that Lilibet my Rhode Rock has her left eye closed, there's no pus coming from it, she lets me open the eyelid. Has anyone got any ideas what it could be or what I should do? Could it be trauma? Any help gratefully received. She seems otherwise in good health and so do the others?

 

[ChickensAreSweet]

http://edis.ifas.ufl.edu/ps031
here's an eye link!