We are also thinking this … ours seem to have perked up but still showing signs of the blindness. Our vet initially thought it could be CCN but maybe unlikely now as they are still going strong. Just the eye sight issue now. We do have a lot of trees aboutNot wanting to hijack a thread, but we've had a few sheep going blind the last few weeks, some have misty lens so I've treated them for new Forrest eye. One today her eyes look clear but she can't see at all?
Is that a symptom of acorn poisoning? We have had other problems but according to blood test not trace elements although I'm not convinced yet!