So, I have had my flock for a number of years now. The old owners of my house left their flock, and I added onto it over time. The only problem was that the chickens the old owners left me sneezed, and now so do my additions. I also want to breed for show and sale, and with sneezing chickens, that is problematic. One of my hens used to have bubbly eyes. (While this happened, she was quarantined. I brought her to the vet to make sure it wasn't something harmful, but the vet was honestly unhelpful.) I am now concerned it is Mycoplasma. I am going to get my birds NPIP tested, but I honestly wonder if it is even worth doing that. Am I being just plain irresponsible for even keeping birds that sneeze? Should I just cull them all, quarantine for a few months, and start completely new? Thanks in advance.