what is a mistdog?

I like plenty of sleep, affection and food, and certain kinds of play. A long walk in the countryside is usually enough to make me happy. Any weather is good, but mist is the most exciting.

I can generally tell when people are happy and unhappy, but I can't fathom why. I'd like to run with the wild pack but I know it would never really work. When I twitch when sleeping, that's probably what I'm dreaming about.