Though there is less of a necessity for working dogs in the modern world, the help of canines has been utilized all over the world for many centuries. From active sheep and cattle dogs, to strong sled-pulling huskies, and service dogs, many pups have been trained to harness their natural strength and instincts toward for practical applications. Chosen for their temperament, sharp minds, quickness and loyalty, many breeds (such as Retreievers and German Shepherds) have been employed as service dogs for the blind or impaired. Search and rescue animals (such as Saint Bernards, Border Collies, Retrievers) are trained to cope with harsh situations like avalanche rescue missions, drown victims, wilderness tracking, etc. Cattle/Herding dogs (like Corgis, Border Collies, and Australian Shepherds) are still used in many parts of the world to help guard and herd livestock. Finally, K-9 forces (most often training German Shepherds, Boxers, Rottweilers, Doberman Pinschers, and Belgian Malinois) have played in integral role to special operations, military initiatives and police investigations.