Hello, I have a Black Australorp hen with a very swollen right eye that I need some advice with. I noticed yesterday that she seemed to be closing it a bit more than the other eye, but it didn't look too bad, so I was just going to keep an eye on her. This morning her was swollen shut and bloody, and her right side of her face is very puffy. I treated the flock for lice yesterday with Permectrin spray and I wondered if that may have gotten in her eye, but the reason I am thinking otherwise is 1. I have treated her with the same solution twice before and nothing has happened, and 2. None of the other 35 birds had a reaction. I don't know if maybe she got dirt in her eye and maybe tried to scratch it out? I put her off alone so the other chickens would not peck her and to make sure she has nothing contagious. Here are some pictures: One picture is what her other eye looks like, then what it looks like closed and what it looks like open. She is still very alert and active, I put her in her pen and she immediately tried to fly the coop. Do you need any other info to help diagnose what is going on and try to figure out what is wrong and how to treat it? Thank you in advance!