hiI'm so sorry you are having respiratory issues with your flock. I am dealing with the same thing. My rooster shakes his head and he and his flockmate hens are having a small amount of watery sinus drainage. I guess when the original affected one drinks from the waterer, the sinus drainage washes off their beak and gets into the water. Then each one that comes along and drinks that same water, is also taking in the sinus drainage as well, thus infecting them too. That's why it's important to separate and quarantine new or sick birds. I have been treating mine with antibiotics for 3 days so far. I have also used some VetRx on the roosters beak, because he is wheezing a little also. VetRx is an all natural liquid that kinda smells like vicks vapor rub. It is used to break up some of the mucus that is causing congestion. I also use Apple Cidar Vinegar in their water occasionally. Yes culling means killing. At this time, I do not plan on culling my chickens. I just won't be adding any new ones to the flock. I don't breed, hatch or sell eggs.
i took a long time to cull for the first time last week.
im so glad i did because i necropsied her and she was a mess inside.
i feel bad, but she doesnt have to face suffering from internal
problems from resp illnesses now.
and i never would have known.......
hope your birdies get better Quick.
tammy