"Coryza is caused by a very aggressive bacteria. I would suggest
Chloramphenicol eye ointment and Gallimycin and Aureomycin/Sulmet
powder mixed in the drinking water for 14 days. This disease is highly
contagious and will spread to other birds if not controlled."
flock has, through chance, never had Coryza. All I have read says:
It is extremely
There is a
characteristic smell that one can never forget.
I highly recommend a professional's evaluation of whatever ails your
flock. Good resouces for poultry medicine are unfortunately scarce.
Peter Brown and Dr. William Patterson are two I trust. You must, as the
responsible person, be through and aggressive. Don't call or email
without a written list of symptoms and observations. If the suggestions
don't work, call/email again.