Our Mille Fleur rooster has completely stopped crowing. He is young, around 18-20 weeks, but had been crowing for probably 3 weeks or so. He was clearly the leader of the pack, perching and loudly expressing himself but for the last week has been quiet and blends in with the rest. When we enter the coop he makes some noise but, the best way to describe it, is that he lost his voice. He sounds what I would sound like if I had laryngitis. Is this a know problem with medication for it or has he simply just lost his crow?