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, ...