Here's the deal.... I have seven hen and one roo. Sunday will be two weeks of them all being on duramicin 10 in their water. This was done as suggested by you all for terrible hacking and wheezing. My hens are much better ( tough some still open their beaks to breathe ... panting possibly???) My roo though is acting unaffected by the meds. WHAT TO DO?? continue with another week? Or individual treatment for him ( tylan or something else injectable). Please help me y'all. We love our roo, he is like part of the family.