we have a flock of 12 chickens and we know that one maybe two has diarrhea because of the evidence left from their perches they are sleeping on. We can't tell exactly which ones though because of how close they are sleeping together. I am fairly sure that one is our rooster. This has been going on for about two weeks now and I've been giving them vinegar in their water to help with parasites, etc. I've not been too worried because everyone of the chicks look and act fine with the exception of our big rooster "Jackie". His crow has sounded a little raspy for the last couple of weeks as well. But examination reveals that everything else is fine. His eyes and nostrils look good. No drainage, just a raspy crow. The diarrhea is just a brown liquid. No blood that I can find. Any idea's what I'm dealing with and the best way to treat it? Thank you all.