Board Thread:WARNING ALL USERS False Info\Spoilers/@comment-4815136-20130810213927/@comment-13965604-20130811013058

Peter isn't a total shapeshifter. He was a somewhat grotesque man-wolf, not a full wolf. I don't think his form is too uncommon from what I remember Derek saying about it. But yes, the two women who could fully shift makes me think its a family trait, or that their line is very strong and fosters and nurtures their wolf sides.