A rooster is over 1 year old, and we have had a few of those, but only one 1yo(or older) at one time. Often a younger underling is present.
Currently, we have a 1 yo BJG - he's been a good boy so far. He is really talkative, and I don't mean crowing. Yes, he crows, but not much...unless we are outside near the run for too long, then he might start to crow several times. But, he talks in all sorts of variations and inflection, sometimes it is cluck-like, sometimes not...more like a guttural noise, but all of his talking is quite varied, and sometimes low volume, like he's talking just to the female near him, and other times more like he's talking to the whole flock.
We have an underling in the run. This male is a mixed breed of BJG+ EE (based on the EE-type fluffy cheek puffs). This male seems to have been taught some manners by the older girls and head rooster. This male is 4.5 months old but likely won't stay with the flock long term.
We also currently have 14 males that are 8 weeks old. 8 breeds, as we are looking for a suitable underling and also entry for 4-H fair next year. They are in a separate pen.