I think that is unusual...though I've only known 2 Wheaten roos (I own one splash wheaten) and my experience is that they're incredibly docile and take great care of the ladies...call them over for food and water, crows for hawks, even watchs them lay sometimes. I wanted one after reading good reviews since I have toddlers no nasty bird is worth the risk to me. Hope you figure it all out!
i've heard sometimes that it can go on a flock by flock basis.. they are currently in my grow out pen with a whole variety of other breeds (marans, leghorns and orpingtons) but they are definitely the most dominating, maybe when the others catch up in size it will help. I will be separating them out eventually, and only keeping two.