Dr. Horowitz is a cognitive scientist who studies dogs. Sex with your sibling is called incest and is illegal in almost all 50 states. Sex with your sibling or other close relations, if you are a dog, ...

All dogs are good boys—but not all dogs are good for families. That’s why these breeders are focusing on health and temperament. Sharon Dippel hugs a retired greyhound that she adopted in Florida.

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, ...