Most "modern" ferrets are so far removed from their wild roots that they're not much into hunting. They've been so domesticated that most don't have many instincts remaining. If left in the wild, I would bet that 99.9% would die of exposure the first night. The rest would die of starvation soon after.
Of the five that I have, only one expresses a real interest in stalking and killing. We arranged for her to find a small mouse, and a couple quick bites to the skull and it was all over. Of course the real fun began when we tried to get the mouse away from her before she packed it under the bed for dinner! One is at the other end of the spectrum and tries to mother anything she finds (including the mouse that the first one killed). The other three are somewhere in the middle, but I wouldn't count on them to hunt. My big male is about three pounds (up to four in the winter) and I wouldn't want him going up against a rabbit that's probably fighting for its life.
I would recommend that you get a beagle or other known hunting dog and put him to work. Good luck.
