And for everyone who thinks real wolves are a pushover... Clearly you've never seen The Grey. ;)
I have a "wolf park" near my home, its has a nearly wild enclosure for them and it has a full pack with all the normal dynamics.
One of them alone is really no more dangerous than a medium dog gone feral. As a pack? Yeah, I'm not going near that when they are hungry. They more are willing to get hurt when in a pack, if it brings down a big meal. Hell their pecking order fights can result in pretty heavy bloodshed.
If hungry, and they are required to eat fairly regularly, a wolf is not really going to worry about a hit from a single MM.
In PF a wolf is fully functional until its at 0hp, and since the PF wolf has 2hd, it will heal a MM hit in 2-3 days. Which is less time than a bad bruise or laceration.
The HP system in this game is fairly abstract, but against most things the MM is no different than a really hard punch. A trained boxer can shrug it off, but the average person is going to be really hurt.