So I had to cull my young flock about a month ago due to what I'm pretty sure was choryza. I want to start over but want to do this right to try and stop this from happening again. I plan on completely scrubbing the coop and run. I'm removing all organic material down to the dirt in the run and then bleaching the hell out of it and the coop. I am going to let them sit empty for a while to make sure any remaining choryza bacteria are dead. How long should I let it sit empty before introducing new birds? Do wild birds carry choryza? Is there a vaccine for choryza? I really don't want to deal with this again so any advice is appreciated. Help!! Thanks!