I have seen several people with this problem, but am still not sure how to give an accurate diagnosis. I first treated it as Infectious Coryza with sulfadimenthoxine in the drinking water. It only was showing signs in my 4 week and younger birds and only in my chickens. Today I found one of my grown guineas with her eye crusted shut, but no other signs. Most of the birds I treated got better, but not all. I have attached some pictures of the chicks that still have it and would love some advice! As you can see in the potos, some have bubbly eyes and some are so bad that the eyes are shut. They look awful and I don't have the heart to cull them, but I guess it is becoming time. These birds have been treated for 6 days now.