We all know that dogs are extremely sociable creatures. In fact, people often say that they are our best friends in the animal kingdom. As they grow up, dogs learn to respond to their names, they learn to follow certain orders, and compared to many other animals, they develop a very good memory. However, did you know that many dogs are trained in order to perform real jobs? In this list, we will introduce you to 21 industrious dogs that have very important jobs, proving how helpful they are for humankind.
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