Speaking of late... One of my hatches from this year is 6 and a half months old and hasn't crowed yet. He was rehomed and is now living in a large flock with a grown alpha rooster and two cockerels his age, both of whom are challenging the alpha and getting their butts handed to them, so I think my guy is playing it safe and laying low as a survival tactic. It might just earn him the right to live, because the cocky cockerels' time is running out and when they push it too far and start drawing blood or getting human-aggressive, they'll go in the pot. So far my guy looks like he might get to live, as a quiet non-competitive bottom bird. So when and whether a male crows depends on other things as well, and can be influenced by the social dynamics of the flock.