No we have seen him attack the adult hens too but he will not come close to the other roo. We wanted to keep him mainly to make babies and He’s a Americana so we wanted to have part Americana babies.
Was he alone with the adult hens without the adult rooster to protect them and teach him manners?
I understand that you want him for breeding, but if he does not change his aggressive behaviour, the hens will not accept him. And if he forces himself onto them they will just eject his sperm afterwards. And if by chance you get some chicks he fathered, they will most probably be cockerels as stressed out hens mostly produce male offspring.