Oh Lord with all respect to Thorin if you use wolves don't use 2Star ones they will steamroller almost everything breed like rats and take over the countryside in a meadows environment. (Ask me how I know!)
1 Star wolves can just about take a Grey dwarf brute and live but this means that you will loose a few now and again the population remains semi stable.

Problem is with that is that stiff raid like "Foul smell from the swamp" will put a huge dent in the 1 star wolf population whereas would barely kill one or two 2 Star chaps...

I only released my 2 Stars to the wild because of the initial Seeker raids - which they have now rescinded! Now may have to wipe them all out just to prevent: as said above "the place looking like a junk yard"