mine had the same problems,sneezing,clear sischarge from nasal and eyes. and one eye swellen shut.I treated them with Terramycin ointment and aureomycin powder in their water and I kept the eye clean by cotton ball soaked in warm water. .they all got ok after 3 days. I realy don't know what they had wether it was just the raspiratory infection or Coryza.How can you tell the diffrence beetween the Coryza and just chronic respiratory disease anyway?mine did not have a bad smell which is normaly sign of Coryza.this important for me because I have some baby chicks coming in march.right now i only have 6 birds.should I cull?