He's unsure, just keep it up, as I said it might take a while, weeks before he stops it, don't back down, always move forward, standing still and looking at each other is how fights start. Good luck, if he's already backing down he may not be as tough as he's making himself, I use my plastic scoop, and will throw it a the trouble making rooster even if he isn't looking, once again a dominant rooster with sometimes chase subordinates just because. Once I know I can trust them they don't get bothered unless they try to mate in front of me, that's a no no as well