That said, both of them I found like that refused to open their eyes the same way yours has, and didn't want to eat or drink at first. Literally the definition of severe depression. One I brought out of it, and slowly introduced to others, and he's now a happy top rooster of his own flock. The other refused everything, and simply faded away. Even drench feeding was becoming a battle with him, and I had to let him go. I did autopsy him, and there were zero signs of any illness or tumors or anything, unless it was in the brain. 
