I am a first time chicken owner and have come across my first chicken that is showing signs of possible sickness in some fashion. She is approximately 6 months old weighing 4-5 lbs. I came home from work to let them free range for a while and found her laying down in the coop. I noticed she had one eye closed and was tilting her head. When I opened the door she got up and went out with the rest of the hens w/ her eye shut. She has opened her eye periodically, and the other hens were picking on her(she has been at the bottom of pecking order from the start and I have had them 30 days.) Did see her poop and looked very normal. We did put some bacytracin-neomicin poly mykin drops in her eye and the eye does look reddish in color compared to the other eye. I would like to treat her myself and would like to administer antiobiotics and have seperated her from the rest of the flock. The coop is a dirt run with a house and a covered area below the house. They are in there coop most of the day and alowed to free range approximately 2-3 hours a day. Could someone tell me what I should give her even if its precautionary?