I have a white Silkie Rooster, when I first got him, I noticed he made a crackling noise. I was told he was only 10 months old, the crackling got worst and he was breathing kind of funny, his nose was runny and it smelled really really bad. I went to the feed store and ask them if anyone knew what was going on with him. They suggested giving him some Summit this antibotic so I did, amazingly enough I noticed the bad order went away and so did the crackling. So I stopped giving him the antibotic, I only gave it to him for 2 days. Wednesday was the last day, Thursday he sounded great, Friday comes and I notice the crackling is back, there's no bad odor yet. But his chest you can feel his bones really bad, he does eat a lot, he does drink fine, and he never had any type of swelling at the face. Does anyone know what this could be and should I put him back on the antibotic??? I have had him now for almost 1 month.... If someone knows what this is please give me some advice on what to do next.. I really don't need my other chickens getting sick, but I would think after a month they would show some sort of signs and they are all doing great.....I just got some baby chicks that I am keeping away from him until I can figure out how to clear him up...