I have watched how wolves break out cow and calf elk from a herd of over 60 head of elk. To me, this is a large herd of animals. There were 7 wolves in the pack I watched from across a canyon that were able to get 4 ahead of almost a dozen head. 3 were behind them with one on each side and one pushing them into the 4 that were lying in wait for ambush. Several of the elk managed to cut back to the herd before the one on the top managed to cut the others off. They absolutely hamstrung the seven they chased and only ate the uterus of the elk. We managed to ride up the following day and found one cow still alive that was damaged so severely she couldn't get up. As we only had bull tags we couldn't do anything. I managed to drive to where I could call the Fish &Game and was told not to touch them and they would send field officers up to our camp for us to show them the kill site. They never showed but called me almost 2 weeks later for information to the site. I guarantee you that wolves will penetrate any herd size they desire and safety is numbers doesn't matter. They decimated huge numbers of elk from the herds we once had and the ones left have moved into areas that they never lived before to escape them. Sadly, now they have Cougars that are preying on them in these areas.