Soo.. How do you know your rooster is aggressive? Should it jump and peck people who go into our back yard? I mean I don't know how tell.. There are 3 kids living with us now and they have visited before and he has never done it before but now whenever they go out there he jumps and charges at them.. Me.. I've been around him since he was a little chick and yesterday he did the same thing to me when I was taking our puppy out to go do his business I don't know.. can anyone help?