Cows are being mutilated in Oregon… Horses in France… And now, officials in North Dakota are investigating the deaths of 58 pregnant cows on July 29 in a pasture near Jamestown.

Rancher Brian Amundson found the dead cows where they were grazing on the Arrowwood National Wildlife Refuge approximately 100 miles northwest of Fargo.

Of the 80 surviving cows, at least 15 have aborted their calves. The surviving cows are due to calve within the next two to 10 weeks. Long-term effects from the incident are unknown.

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