I think it's individual and also how it's raised. There are some prone to being aggressive and no amount of love or socialization will change that. I currently have 2 cockerels that I'm raising but will only keep 1. Both I can pick up, both will roost but I will only keep the one that maintains this calm. If they both stay that way then it comes down to which one I like more (one is barred rock, one is dominique and I'm favoring the dominique because of it's rose comb it's the only one with it so for me it will stand out) I will not be sad at not keeping a rooster just as you feel now disappointed it didn't work out. Human aggression is not acceptable though in any way. Yes they get teenage attitude but I'm a stand my ground person. I didn't back down to the grown roosters that came at me and I won't to these guys but I won't keep any that fight a person or my child. Child trumps my desire to have a rooster. I'm sorry this one wasn't a to do. Was it a certain breed? Did they come from same breeder?