About a week ago I noticed one of my small banty hens had a swollen eye. I isolated her for a few days and it seemed to get better but now I have noticed two other hens, a Polish and a silkie with the same issues. They are not coughing wheezing or having any respiratory distress but just the watery swollen eyes they are still eating and drinking but a little lethargic. I am kind of at a loss for what to do for them. I'm not sure if this is something serious to be really worried about or perhaps just some sort of strange eye infection. And my vet around here doesn't really know much about chickens, so they're not too much help. so any help you could give me would be great and much appreciated!! I have about 50 birds, so if i have to cull them all because of some infectious disease I'm going to be heartbroken but it will be necessary.