Agreed. Time to fix that behavior now. When my chicks get old enough to be able to tell which are the cockerels, I start "training" them. I make them move away from me. I walk through them. I don't back down if one comes my way - instead, I walk briskly toward him. I move them away from the feed and water just because I can. Basically, I let them know that I am the boss. I don't turn my back on them as they start to mature. Not until I feel I can trust them. I couple of years ago, I had a beautiful buff rock cockerel that would give me the stink eye every now and again. Whenever I saw it, I'd walk at him and make him move. Every time. One day, I was nudging the last pullet into the run so I could lock up for the night, and of course she made a fuss. He came running toward me, I looked him in the eye, and suddenly he had important business to take care of on the other side of the run. It's like his little chicken-brain said, "Nope! Not gonna go there." (unfortunately he was killed that summer, apparently defending one of the hens) Some cockerels get it - especially if you start teaching them from early on that you're the boss. Some just don't, and you don't want those around. There are too many nice ones to put up with an aggressive one.