My question is whether he will get larger yet or is he pretty much at his full size now?
They are all different but on average I'd expect a 6 month old to get maybe 20% to 25% larger. That's just a guess, I've never actually measured it.
@oldhenlikesdogs @Folly's place @Mrs. K @aart are you willing to venture a guess?
As he gets older is this likely to change or at 6 months is he showing us what kind of roo he will be?
They can change at any time but so far it sounds pretty good. He's still a little immature, otherwise he would be dominating those two. It's not about size, it's about maturity and the spirit of the chickens involved, male and female. When he does mature enough to try to take over from those two it may be such a smooth transition you don't even notice until you see them willingly squatting for him. Or it could get violent for a bit. Even if it gets violent for a day or two, when he take over and they accept it things usually get really calm.