Hi all I've kept between 10-15 chickens for nearly two years now and this is my first time dealing with any illness. One hen presented with a bubbly, clear watery eye that cleared up the next day. But then another hen had it, then two more today. The first one still seems back to normal. Is this respiratory illness? If so, how do I know which one? Must mention - I brought home 5 nearly 2 year old hens that I found on Craigslist ten days before this started. Guy seemed honest....said they didn't fit with his new breeding program.... What do you think?