Chances are it's respiratory and/or sinus infection, and your whole flock has already been exposed or is carrying, separation is moot.
Many are carried without symptoms until a stressor incites an increase in the organisms population and affect.
Treating with AB's is a crapshoot, and could just make matters worse-or create resistance, unless you've had a swab tested.
Many are carried without symptoms until a stressor incites an increase in the organisms population and affect.
Treating with AB's is a crapshoot, and could just make matters worse-or create resistance, unless you've had a swab tested.