I don't think anything should be slaughtered unnecessarily, just because it ' exists'....BUT...if a species has been out of an area for an extended period of time...leave it out and don't go trying to re-invent the wheel.

The whole enviroment changed during the time the wolf was gone from Yellowstone, etc.    Leave'em out / get'em out of there.

Now, if they had never been eliminated from the area....these problems that are happening now might have been avoided as adaptations ( I don't dare use the word CHANGE here) would have been made all along.    Who knows???

I was in the McDonalds in Livingston MT just after the first wolf release , '95 I think, and saw the damnest fist fight break out over AM coffee between ranchers and ' nature' people!!