From MPRNews.org in Minnesota:
When cattle are killed or go missing from the ranches here in the northwest corner of Minnesota, it’s usually state or federal officials who investigate reports that a wolf was responsible.
Those investigations can mean the difference between a rancher getting paid for a dead animal, or simply writing off the loss.
State and federal investigators verify a wolf killed a domestic animal about 50 percent of the time. But, at least in Kittson County, local authorities find a much higher rate of kills.