In an agriculture industry increasingly reliant on complex technology, dogs herd sheep; watch over cattle; detect invasive pests and plants hiding in produce for U.S. Customs; track metal theft through forensic marker recognition; and even hot-nose the trail of crop-destroying feral hogs. In addition to workaday value, for many farmers, dogs are simply ever-present, loyal companions — maybe a faithful Lab that is lord of the truck bed....
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