You can use eye wash for people you get at the drug store. Neosporin works, I guess, but we use terramycin eye gel you can get at the feed store. Wash and treat the eye with the gel or ointment twice a day. Probably the eye will be ok, and you shouldn't need oral antibiotics, but that's really up to you, you can add terramycin to her water if you want to, or if it doesn't look like the eye is clearing up.. If you do that though, don't eat her eggs for two or three weeks after she finishes the antibiotics. We had this happen to a roo , he was attacked by other roosters and he did eventually lose sight in the eye, after they had pecked it, it looked like it cleared up after we finished treating it but he went blind in it later. He can still see fine out of the other one, and he seems happy.