That is too funny. That is what mine do as well. Although I only have one cock bird and all of the rest of the cockerels are under 6 months old, they still like to puff up and pretend that they can take on the big boy (he pretty much ignores them and looks like he's saying "really, REALLY?" Tonight, a hawk was sighted and the only one with enough futzpah to stay outside and keep watch while the rest cowered in the coop was the big boy. So, I guess they don't have as much testosterone as they thought they did!Now mine, when divided into breeding pens, seem to like to show off for the ladies by talking smack through the fence with the males in the neighboring pens. Knowing that they didn't need to back it up seems to encourage them. In years past when I could let everybody free range together after I had all the chicks I needed. These great braggarts that had been badmouthing their neighbors through the wire with impunity, would suddenly find themselves face to face with out the protection of the wire. and feathers would fly. After 10 minutes, or so, the order of the universe would be restored, and things would settle down. I don't believe you would get away with that with most breeds.
Along the same lines, the only time mine get their dander up is when I'm grabbing their girls. Even then, they posture and make some noise, but they never approach or object with any type of violence. Now some of the girls can get a little aggressive when I am handling them, but their pecks are generally pretty non threatening. But all of them come over to the fence to talk to me when I'm out there and are generally very non-flighty birds. My last flock of layers would run away when I came toward the fence and hide under the tree until I left (unless of course I had some favorite treats to entice them out). The brahmas seem very non-plussed about almost everything....exceptions are hawks and dogs (probably due to experience).