Dogs are widely known for their loyalty, loving and also can be easily trained. Despite the great friendship a dog can give to a human they also are exceptional workers. That is why dogs and certain breeds in particular were used for centuries to perform different kind of jobs.
Lhasas were used as monastery guards in Tibet to guard the buddhist.
During the Victorian era they used specifically Pit Bulls to babysit babies. During that period of time they were seen as affectionate and loving guardians.
The Saint Bernards were once used as alpine rescuers to help search for trapped people by storms or avalanches. And if you are wondering what use has that barrel around their neck, is because it held brandy to warm and revive the survivers.
Dogs were used, and I believe they still perform the job of sheep herders. As humans began to breed and keep cattle they needed the dogs help to herd them.
Especially the breed Belgian Malinois are used as Navy SEALs.
The Newfoundlands are known to be great in the water, but apparently they are much more than that. Back in the days they were fisherman retrieving all sorts of things from the water.
We know that a dog sense or smell is very developed. But what most of us do not know is that specifically the Italian breed Lagotto Romagnolo. This dog is known for his ability to track down the truffle fungus, considered a very rare ingredient in the culinary world.