Our 7 month old rooster has had bubbles coming out of one of his eyes for the last 6 weeks or so. His comb is also very dry looking. We started treating him, and the rest of the flock, two weeks ago with a water soluble tetracycline. We followed the package instructions for a 400mg dose, 2 Tablespoons per gallon of water, and administered for 9 days with no noticeable change in his condition; not better, not worse. We contacted the hatchery where we got him and they recommended sulmet as he might have a strain that is resistant to the tetracycline. We started the flock on the sulmet yesterday & this morning he seems a bit worse. I did some online searching and sulmet isn't listed for CRD treatment. What should we do? How can we save our rooster?