Wolf

Wolves are a planned mob. Notch has stated that they are going to be a definite addition and will also have the ability to be tamed to provide Pet Dogs. Notch has confirmed the addition of these animals upon having breakfast with a friend, along with confirming Dogs, as said on his blog.

According to his twitter, Jens is currently working on a wolf mob for the game.

NOTE: Though there are wolves available with the Mo'Creatures mod, this is not the same.