purpletree, thank you so much for the info. If I become 100% convinced she needs antibiotics, I will proceed with what you recommended. In fact, I'll probably order that medicine to have on hand in either case.
Year of the Rooster, she has been keeping her eye closed almost all day. She only opens it in moments of excitement or stimulation. I've been very close to her and haven't smelled anything, but I haven't exactly sniffed her face either...None of them appear to have discharge.
The only explanation I can think of other than sickness is that maybe another hen pecked her eye at bed time, and maybe that injured her and prevented her from getting a good night's sleep (which would explain the sleepiness)? Seems pretty far fetched, I know. I guess I don't want to believe she's sick. That said, I'm maybe 85% certain she is.
The kids and I picked blueberries today, so the hens got some of those. They also eat a lot of grass from their yard. I'll definitely try to give them more fresh healthy fruits and greens tomorrow. Is there any way to tell a virus vs. bacterial infection? (I'm thinking probably not - It's hard enough in humans and I know them much better than chickens!) I'm hoping to avoid the antibiotics, of course, but it feels good to have a plan just in case.
Thanks again,
Shannon