Hi guys. I need some advice from experienced chicken keepers... It started when I brought home a pair of Bantam Seabrights and, stupidly, did not quarantine them. They began sneezing and had nasal discharge. It quickly spread throughout my entire flock (minus the guineas). It involves rattling, sneezing, swollen watery eyes, nasal discharge, and sounding like a dog toy when they breath. This has been going on for about 2 months. I have lost about 3 young pullets (3 months old or so) and about 3 or 4 adults. I primarily keep my chickens for eggs. I sell eggs locally and generally add new chicks each Spring to keep my egg numbers up. My first thought was Infectious Bronchitis, but I have seen several articles that say the virus only lasts a couple of weeks...obviously this is not the case in my situation. So, then I went to Infectious Coryza today...I did have a chick that showed severe eye swelling. I have a call into my vet, but she is waiting on some info from an expert. My question is, do any of you have experience with either of these illnesses? If so, do I need to worry about my future chicks being infected, even after everyone else is "over it"? If so, I am considering culling everyone and starting over I just don't want to end up losing half of every batch of chicks that I introduce to the flock... Any advice would be great! Thanks in advance!