I just purchased 5 mature hens. One hen I noticied after about 2 weeks, had one eye closed. She is eating and drinking, and active. She has no drainage from the eye or beak. I thought she may have injured her eye somehow. Now, another of the hens has the same thing, in one eye. Also, one of my own hatched, 5 week olds chicks appears to have the same problem, and she has been housed in a seperate area from the chickens, and I make sure to wash my hands when going from one coop to the next. Can anyone tell me if this is the early stages of something serious, will it spread, and if I choose to treat it, (or Cull) can I risk leaving the infected with the rest of the flock? I have no way of seperating them at this time. Thanks in advance for the help.