Fenway's a terrier mutt and he's pretty calm. However, he can freak out once in awhile. Just last week my sister took him overnight. When I went to pick him up the next day, he ran aound her house 3 times like a speeding bullet.

And when he's outside, I have to watch him very closely and make sure he doesn't get too far. It's kind of cute, because now he'll walk ahead of me and every once in awhile, he'll look behind him, to see if I'm still there.