Ok. I have a TON of chickens of all sorts of breeds, but I have one particular boy - a silver laced wyandotte rooster - who makes noises that sound like metal on metal. It doesn't even sound like something any animal would make! Is this normal? Should I get him to a vet? He isn't sneezing or weezing... very healthy (and BIG).... he just is at that point where he should be learning to crow and it isn't like that at all. It sounds like squeeky brakes or metal on metal grinding. I'm at a loss.