Weeg
Enabler
Ooo, good point. You wouldn't happen to be using cedar shavings would you?Odd that the second one seemed OK and now has it's eyes closed. What do you have in their pen? Pine shavings? Any chance there is something that could be irritating their eyes?
Just trying to brain storm what it could be aside from a genetic condition or illness.
Poor little chickies. I hope they recover.
Otherwise, its probably something developed form hatching, or what @sourland suggested.