Just hoping the Dawnguard are less stupid and extreme than the damn Vigilant of Stendarr. I'm all for fighting evil, but they take it too seriously and extremely. Like, even for helping Meridia(a Daedric prince that's not that evil) they'd cut you down if they knew you did. So, hoping the Dawnguard aren't like, "EVERY VAMPIRE IS EVIL EVER KILL THEM ALL," etc.
Well, generally Wolfies come out at night, aye? They're guarding the dawn against anything that goes bump in the night. So I'd suppose they'd be against hungry, giant Wolves as well as Vampy Vamps.
But the werewolves in Skyrim can control themselves because of their unique blood.