I have a new 4 month old rooster and I noticed he sounds like he is growling sometimes when he breathes. He looks healthy to me but he does have a musty odor. I attributed that to his digging in the moist dirt in my yard and dust bathing. Today I noticed a bit of dried goop on his nose, not a lot, just a smear of it. He eats and drinks and is active, perhaps not as active as my chickens but he seems a bit cautious in his new environment. And yes, he has been near my other chickens. He is in a separate cage but close enough that they are probably at risk. I am a new chicken owner and would appreciate it if those of you who have been through this could give me your opinion. Is he ill and what should I be watching for and is it something that will haunt my flock forever? I did try to research it for myself but just couldn't tell from what I read. Thanks in advance.