I have noticed some breeds (and maybe specific bloodlines of it) can be really mean. I kind of intentionally picked a Barred Rock from a place I had gotten another meanish one from, thinking he might be protective. My grown children (remembering the roo of old) said "MOOOM what are you THINKING!!" when they heard I'd gotten a barred rock rooster chick a couple of years ago! When they were little the old one terrorized them. The new one is ten times meaner than the original. The first one was a coward, flopping against the back of your knees, it could drop you to the ground! Mostly from surprise! This new guy will fly right into your face. No amount of knocking him back phased him. If I grabbed and held him (works with most birds, especially geese, they hate to be held) he'd leave me alone for ONE day only. He'd be flying into my face the very next day. But he is not protective with dogs, they can walk all around him. I think the chicks you raise yourself of these breeds are worse cuz they think YOU are a chicken! You are a big rooster after his hens. I finally had to put this guy in his own pen with one hen that I don't have to go in every day and net him if I do go in. He almost put my eye out with his raggety wing shortly before the move! My Rhode Island Reds from the same hatchery came at me one time each and never again (I simply caught and held them, it was enough.)