My rooster was fine last night but when we came home this afternoom, his one eye was completely covered with pus and swollen shut. I can see it bulging up is it so swollen. He is eating and walking around find (besides not being able to see). I am also worried because when I closed them up tonight one of my young hens was sitting in a box breathing with her mouth open and her one eye was closed and looks like it's going to crust over too what could this be? How does this happen so fast? And what should I do???