We have a mixed flock of eight egg birds we've been raising since they hatched. The chicks were sexed but we've had a hunch that our Australorp is not a hen...it grew faster, developed combs and wattles at about 6 weeks and now...gulp...is making a funny moaning sound in the morning! It's about 13 weeks old now. My question is, do roosters work their way up to crowing? Could this be a variation of development for a hen? We'd actually like to have a rooster around, but our city codes are on the strict side, especially with noise complaints from roosters. We don't want to blow our cover. Thanks!