I just went through a similar issue. My older hen pecked one of my pullets in the eyes, twice. They were very swollen and ended up draining somewhat. I isolated her from the bully until she could see again. I cleaned the eyes out a few times a day with eye wash that you can get at any grocery store/pharmacy. Then I used Vetericyn Opthamalic Eye Gel to keep them protected. She had a little drainage from her nostril as well, but as soon as the eyes cleared up, so did the drainage. I only had to keep her isolated overnight. I did buy some Duramycin (antibiotic) but I didn't use it because it wasn't an infection.