The single wolf I have is sitting at home, always. I tried taking him with me, but he gets so much in the way. Also, they're pretty useless when you want to go somewhere by boat or minecart.
Speaking of, my first minecart track is done. It's basically a scenic tour of my map, taking 3:45 minutes one way. The end point is currently in a beautiful area with huge mountains, sheer cliffs, and giant caverns.