They start by getting black almost mold like spots areound their eyes, then they start shaking and scratching their heads. After a day or so they get very lethargic and just lay down. Towards the end they almost seem to be blind, they stop eating and drinking and hand feeding does not work. I have already lost 4 hens and 1 rooster, whatever it is it seems to have affected all 4 coops. I am concerned not only for the rest of our chickens, but my family as well, is it something that can be passed to us?