She's sweet!
For the eye, if you notice anything off or become concerned, flush it out with saline, remove any debris, etc. Sometimes they may get something in the eye just like we do. If the eye seems irritated, then you can put some ointment in the eye a couple of times a day. Terramcyin...
I like your coop!
I'd start transitioning them off the medicated starter and just feed unmedicated starter or an all flock feed. Try to limit the treats as well.
Could be she's getting bullied, but hard to know. Let me know what you observe.
Please post photos of her, her eye and her poop.
What do you feed, including treats?
How old is she?
When was her last egg?
How much coop/run space do you have (sq ft) - photos of housing may be helpful.
Drooping of the tail is often an indication that one is not feeling well. Look her over...