I have 30 free ranging chickens, two of which are roos. This morning I let them out of the coop and heard the top roo wheezing (it was loud, couldn't mistake it for anything else). The two roos then had a scuffle and the top roo ran which is really unusual as the other roo is normally the one to run. The second in command chased the top roo into the coop and when I got in there, the top roo was cowering in the corner breathless and the other roo was on top of him???? I got him off quickly and carried the other roo into a pen in my garage where he has continued to wheeze. None of my others have this problem. What is it? How do I treat? With what do I treat? and will the others get this? Many thanks in advance