I´ve enjoyed reading through this. I currently have 4 x 1-month-old chicks with it. I´m thinking of moving my chickens´ run, as their run is near the road, where my neighbour´s chickens wander about, and they go down with it on a very regular basis. This is now the second year I´ve had it here with mine.
I´ve read that wild birds can also carry it, as well as mosquitos, so it seems it´s almost impossible to avoid it.
Last year a number of my young birds got it, and three small chicks stopped eating, they couldn´t see anything, so I hand-fed them for a week until they could see again. I lost one chick, and one of the survivors lost his eye through it. He now has a hard lump under his eyelid, I don´t know what I can do about that. Those three younger ones that got it were really sick. I bought some stuff here that´s supposed to help, but I´m not convinced it does much.
There is a vaccination against it, but I can only get it for 100 birds at a time, and it´s expensive, so not worth it. I don´t breed that many birds.
So now I´ll go and catch up the 4 and see what I can do to take the scabs off and apply iodine carefully. One has it all over its eye. I didn´t think to do that last year, I didn´t imagine it could help them, poor things. Everything I read just said that they get over it... (The older ones all got over it very well, just had scabby faces. You wouldn´t know now, and it certainly hasn´t interfered with egg production for them either).
Interestingly, it´s just these younger 4 that have it now. The older chicks seem to have avoided it so far. The adults have already been exposed last year, so they´re not likely to get it now, I think.
Right, off to catch me up some chicks....