The pug’s flat face and tight, corkscrew tail didn’t appear by accident; we engineered them. That “baby-faced” muzzle crushes airway space, making heat regulation and simple breathing a struggle.

For thousands of years, humans have selectively bred dogs to fulfill specific roles, ranging from guarding and hunting to herding and companionship. This deliberate shaping of traits has resulted in ...

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 ...