Over the period of 2 weeks at least 10 of my above pheasants have come up with swollen eyes - to the point the eye is not visible anymore. It is swollen around and under the eye and discharge coming from the eye area as well as nasal passages. Both "nose" holes are clogged and they are breathing through the mouth. I used Dumosol 500mg ( Metronidazole) in the water but although the earlier birds with symptoms recovered the 8 or so birds seem to continue with the symptoms without any recovery. Can you tell me what the problem might be and what medication to use to treat them.
Currently owned by 8 city chickens