Centuries of breeding have reshaped dog brains—here’s how

The role for which a dog was bred—say retrieving birds—is reflected in their brain structure, according to a study of 33 breeds.
The New York Times

But how much does breed shape a dog’s health and behavior?

Humans have a long history of reshaping their canine companions, which evolved from ancient wolves. At least 10,000 years ago, Arctic peoples were using selective breeding to create sled dogs, ...
Ars Technica

Many genes associated with dog behavior influence human personalities, too

Many dog breeds are noted for their personalities and behavioral traits, from the distinctive vocalizations of huskies to the herding of border collies. People have worked to identify the genes ...