Hi. I have a young hen who has one swollen eye. No coughing, sneezing, oozing or anything else. She eats and drinks, but I just can't figure out what she has. I gave her 3 doses (injections) of Tylan 50. No change. Then I gave her 3 doses (injections) of the antibiotic that starts with an O.??? (Sorry, it's late and I can't recall the proper name) But there was also no change. I have had her separated for the past two and 1/2 weeks. No other chicken is showing any symptoms of the same thing. The chicken has to be getting depressed being by herself. Does anyone have any idea of what I should do next? I was thinking she may Coryza, but she has no respiratory problems at all. No symptoms other than her eye is swollen. Any suggestions? Advice?