I have two roosters (I am positive they are both roosters) and they are about a year old. I have seen both of them crow before but all the sudden my one rooster stopped crowing (he is below the other rooster on the pecking order, don't know if that makes a difference). is there any reason this should be happening? He is still healthy, active and comes up to me whenevery I have treats for them. Just wondering if I should be concerned.