feral hogs

War is being waged right now across the country -- against huge, ever-growing packs of feral pigs that are running rampant, destroying crops, killing wildlife and spreading disease everywhere they go, the U.S. Department of Agriculture reports.
Historians think the hogs were first brought by explorers to this country from Spain in the late 1500s. The boars bred and spread -- and have chomped their way across the country ever since, devouring crops and small livestock.

A teenager in Texas with a dead large hog and a map showing the wild hog range.