Hello, We are new to chickens and I was looking up diseases online for chickens and this thing called Corzya keeps popping up. We have a rooster who keep making a weird noise after he eats his food and shakes his head. We opened his mouth and it smells bad. No puss, Swollen face, scabs or crusties. He is isolated by himself since this started. Should we Cull all our birds? Ducks seem fine, so do the guineas and all the other chickens no snotty noses nothing. Please help. If I brought him to a vet would they know? will our land be contaminated, should we spray bleach out their like the coop etc what about the soil?