So I noticed in one of my coops this morning, I have a sick bird. She has a bit of wheezing, and crusty nostrils. I checked everyone else in the coop and I see a few with crusty noses, but no one else seems as ill as her. I've put her on quarantine and decided not to let this coop of birds out to freerange with the others today...but my question is, what should I treat the birds with? Should I treat the whole flock? I coop my ducks in one coop, older birds in one coop, and younger birds in another. This is my young bird coop that seems to have the issue. Any advice would be appreciated. Thank you!