Looks like a BR then 

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I've heard of BR being more dominant/pushy. My one adult barred rock (have two in the brooder) is completely indifferent to the flock. She does her own thing and has no interest in being a part of their daily business. She sweet with people and doesn't pick on other birds. She just ignores them all together. She may be a bit "special" though, so that could play into it.