My ducks and chickens live together, and I recently bought some chickens that ended up being sick. I'd never had these issues before, and I wasn't even really aware of them, so the new chickens were with my entire flock for 1 day before I noticed they were unwell. At this point, i'm assuming that my entire flock is infected and I'll have to cull them (i'm not going to be corrupt and sell people hatching eggs/chicks that are carriers of disease). My main question is, are my ducks also infected? Do chickens pass respiratory diseases to ducks? Thankyou.