So I noticed one of my hens has cloudy eyes. I'm thinking she is loosing her vision. Stumbles out of the chicken run when I let them out into the yard. She doesn't stick with the flock. She pecks aimlessly at the feeder and doesn't seem to "forage." Has anyone had a blind chicken and did they thrive? Also is there any kind of disease that causes this? I saw a thread on Mereks but they was never any swelling or puss.