I think 1 of my 2 yr old khaki cambells has gone blind. She didn't follow the other ducks out to forage this morning so I knew something was wrong but had to leave. When I got home she wasn't with the others and it was dark by the time we found her under a bush in the front yard. She was walking ok, but slowly. Her pupils react to light, but she didn't show any reaction at all to hands waved in her face. We put her in the coop with the others and will give her a better look over tomorrow. Any one seen this before? She's been real healthy up until now. They get layer crumble plus a lot of time foraging about 2 acres of yard.