I have an 8-month-old Araucana hen that has been a little lethargic. I assumed it was due to the heat. In the past couple of days, the bird has show up with a pasty butt, and swollen sensitive eyes. There is no discharge, but I could tell they were painful in the light. Tonight I have found 2 other hens, which appear healthy, but one has a swollen eye, and the other appears to be having vision problems and the Araucana is as well. I am at a loss here as to what may be causing this. Any ideas?