Status as of this morning: sebrite rooster getting better after two days of tylan 50 injections. Swelling in eyes and head went away along with discharge. D'anver hens doing better now too with injections. Once closed eye is now open and both eating and drinking normally in separate cage. Barred rock got her first injection yesterday and is still slow and barely eating. Lastly, my four brown leghorns are very active but make lots of gurgling sounds and will administer injections later today.
Glad they are responding to the antibiotics.
The issue you now have is that you have this in your flock and so it is difficult/morally impossible to sell any birds that have been on your property (including chicks) unless you tell future buyers that you have it, or start over.
Not an issue if you never plan to sell chicks or birds.
I have seen people on BYC who KNOW they have respiratory disease in their flocks and still rehome (for what ever reason) birds that have been in contact with sick birds. That is exactly how these nasty diseases get into and spread in backyard flocks and spread misery and distress.
In this situation the responsible thing to do is to destroy unwanted birds and not assume evey flock is infected and move on birds they don't want.



Sorry getting off soapbox now...