I have a Tuxedo male that appears to be ill and has been getting worse over the last week. At first it started with his crow sounding a little bit weird and distorted, but I thought nothing of it. After it continued for a few days I thought it was rather strange, but nothing to worry about, so I though I'd let him get over whatever was bothering him. One day shortly after that his voice became very quiet, almost inaudible. He would get in his crowing position and crow, but you had to strain to hear it. I then got worried, but still waited, because I had no idea what was wrong. Now I can hear a wheezing whenever he is breathing hard or scared, and I am not sure what to do. I think the cause might have been bacteria in a water dish or dirty litter, so I changed water dishes and the litter, but I'm afraid no change has taken place since then. I also tried putting a little but of vinegar in his drinking water, as I hear it helps to protect and fight illness, but he still seems to be getting worse. There is no crustiness or outward signs of illness on his body, it is just the wheezing and lack of voice. What course of action should I take at this point? Is there some sort of medicine or technique I can try? Can anyone identify what might be affecting him? I would greatly appreciate any advice.