If you want to stealth attack, as a couple of people have said, approach them downwind.
Downwind can be found by looking at the snow,
Every third sway (I think) on a tree or bush,
The way sand blows when you run,
Or the way leaves blow when you run through a tree or bush.
(I know I was quoting almost directly there.)
However, you can't just sneak up behind them. You need to jump from a distance and land right near them, downwind of course. This takes a while to get used to, but after you get the distance down it becomes almost second-nature.
A couple of people have said that if you jump flip over a wolf you can slit his throat. That's one way, which works very well. I made a movie of beating the campaign level with three wolves using only stealth. Hopefully that will prevent further questioning.
Another way is knock them down a bunch, and then rabbit-kick them into a tree or hard place.
If you have a heavy weapon, (not a knife) improvise.(For a staff, try to knock them down and beat them until the staff breaks.)
Also, even though many people have said this, you can get a knife throw one way or another, knock them down, and then roll or back-handspring over their bodies to wrench the knife out for an instant kill.
You can even kill them with a crouch body-punch, but that takes a while. (I did it with a baby wolf on wolf den.
)Another way that I find works very well is wall-kicks. And I know that enemies will almost always roll under wall-kicks, but here's how I do it. Get an enemy very near a wall, and jump towards the wall and flip right when you're against it, and them immediately wall-kick. The wolf should be completely stunned before you hit. I don't know if anyone has mentioned this, but it works every time if it's done right. This is the only way for me to kill a pack of wolves without a weapon.
All these will work on rabbits, too, but you can stealth-approach a rabbit from any direction.
