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The chief roles of most domestic dogs today are companionship and affection,
so it's easy to overlook the fact that myriad dogs around the world serve
people in additional ways. Not long after dogs first came to share their lives
with humans at least 12,000 years ago, we discovered that we could train
them to perform certain tasks. The first working dogs may have helped
humans on the hunt or protected livestock from predators.
Over the millennia, we found we could breed them to our needs,
creating dogs perfectly suited to specific purposes. In this slide show, see ten
different dogs at work, some in age-old jobs, some in jobs less than
a century old. To launch the slide show, click on the image at left.—Lexi Krock
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