neutering at an older age usuualldoesnt help too much; its mostly also learned behavior; once they've learned to be male, they stay that way... it just tones down the hormonal PUSH a bit... and no, htere is no such thing as an animal being playful. when it is being agressive. there is a big difference between a male like my dog that play bites and growls with hubby but if u say ' STOP PLAY', he stops, and he never breaks skin, and he only does it when he is 'asked' to PLAY ROUGH *actually hubby speaks to him in thai, but the idea is the same. the dog gets 'invited' to play box and grapple and grab. and only with hubby, and stops on command. and he is neutered.
an aggressive rooster is just that. an agressive rooster. because he is a rooster. there are mellower roosters and less mellow roosters, just like people. but, althoiugh u cant get rid of a person, u an change an animal or get rid of him/her. excusing behavior as 'play' ends up with someone, usually a person /child, injured (or law suit== but officer, he was just trying to play while a big dog latches on to a small child.)
and agressive play in dogs is not gender oriented... there are some females that are much more 'mouthy' then some males (friend's saluki is one, very very mouthy and has yet to learn her strenght, so she is not allowed to mouth anyone but her owner)....
and yes, u can train chickens, just depends on what .... my thai chicken babies are learning not to rush me when i come in to their greenhouse to feed them. i hate when animasl rush me for feeding. when they rush me, they dont get food, as they turn their backs on me and rush back towards their feeder, i throw some veggies there as reward, im thinking of using a bell so that they learn that when we ring a bell, they run to their feed dish. hubby trains them to stand up in their game cock stance when he snaps his fingers at them; they all stand up tall. when he says coococococ, they run after him. its all conditioning. check up n the internet all the things u can train chickens (shape behaviors) to do.