I'm new to backyard chickens but have read all the threads on the subject of a swollen eye I can find. She is eating and drinking well and have tried 5 applications of Terramycin eye cream with a slight reduction. In swelling. She is separated from the flock in a cage . The only other symptom I'm noticing is some greenish watery diarrhea . Any help you can give me would be great. I have tylan 50 on hand but wasn't sure if I should give the eye cream more time? Thanks in advance for your help!