Now that said, I think you are all missing the point.I f the wolves are killing domestic animals and so quickly. I would be in fear of them traveling in to populated areas , human children would have now defence to life though this packs attacks.
They are killing a domestic animal out in the woods in their territory, another predator as they see it. It is not the pack going to the man's home and killing his animals.

Also, I don't think people realize this.. but in college and during my vast research on wolves in North America, I learned this:

There is not one single recording of a healthy wolf (non-rabid) ever killing a human in North America.

Cougars and bears are far more dangerous to people.