Nick wasn't quite as cautious. He didn't think he posed an intimidating figure, even as a wolf. Though that was a time when he was probably wrong. Walking right over to Stiles, not taking his time about it, he just headbutting him in the arm. He meant to do it gently but even then it came out a little firmer than intended.
Why they were doing this still wasn't completely clear, it didn't seem to him like something they needed to go out of their way to do, but they could have some fun with it anyway.