Thanks, for posting the link. It is interesting to see how to get pus out from around the eye. If the Tylan cleared it up, it may be MG instead of Coryza, in case you would want to edit the title of your video to something like “removing pus from a chicken’s eye.” To know for sure what it is, you can get blood drawn for a PCR test by a nearby state poultry lab. That way, if you decide to get new birds, you could check into getting them vaccinated.