I would NEVER give a chicken (or the flock) any medication without knowing for sure, what is being treated. Most wrong ones have a harder effect on the bird than the problem, and may hide correct diagnosis. Have your opened the beaks and looked a the lining of the mouth and the tongue? Is breathing noisy, as if the nostrils are plugged? Always good to move suspicious problem birds away from the flock, as first symptoms can spread quickly to a whole flock. Good luck
