5 days ago, I found one of my hens with her right eye shut and the nictating membrane covering most of the eye. I figured she had gotten pecked in the eye, and I could see a brownish thing (which I thought might be old blood) at the edge of the nictating membrane. I left her alone, as she seemed perky & otherwise normal. 4 days ago, same. 3 days ago, there was bleeding from the eye. I made a very mild boric acid solution & washed the eye & dripped some of the solution into the eye. But after being washed, the eye was slightly open. She laid an egg that day. Yesterday, the eye began to look more swollen around the orbit. It was glued shut when I got up; I washed it with boric acid solution twice. She laid an egg yesterday. Today it looked even worse, so I got Terramycin opthalmic ointment from the feed store, on their recommendation. By tonight, the whole side of her face looks swollen and I think there may be other swelling (inside mouth? throat?) because she acts like she has something in her mouth she can't get out. But, she is eating & drinking, laid an egg today, went out and scratched around the yard for a while & generally acted like a happy chicken, talking quietly to herself and so on. If this is an infection (and it looks like it) by this point, how long before I should expect to see results with the Terramycin? If that doesn't work within a couple of days, do I go to a systemic (water-based or injectable) antibiotic? I just lost another hen to (what I think was) egg yolk peritonitis and I'm discouraged. Having 2 out of 3 chickens sick or injured from unpreventable incidents in the course of a month is heartbreaking.