Dogs have been around humans for over 30,000 years and have earned themselves the title of humans’ best friends. Since being domesticated, the species has undergone dramatic changes due to selective ...

Add Yahoo as a preferred source to see more of our stories on Google. Dog brain communication networks differ with selective breeding and training, revealing how dogs became so responsive to people.

For the past couple of centuries, humans have been breeding dogs to meet specific physical characteristics -- to make Golden Retrievers fluffy, to make Rottweilers muscular, or to make Chihuahuas tiny ...