Wolf DNA seems to have influenced the size, smelling power and even personality of modern dog breeds, scientists said.

New research led by scientists at the American Museum of Natural History and the Smithsonian's National Museum of Natural ...

New studies of canine genetics shed light on the diversity of dogs and our longstanding, still-evolving relationship to them.

U.S. scientists analyzed the DNA of numerous modern-day dog breeds, and found that two-thirds of pet dogs have traceable wolf ...

Chihuahuas, rat terriers and miniature poodles are muscling in on strength contests long dominated by big dogs. It takes high ...

The wolf DNA isn't left over from when dogs and wolves diverged; instead, it most likely came from interbreeding in the past ...

This Chihuahua puppy is absolutely hilarious, turning a robot vacuum into her own personal chauffeur that takes her around the house without lifting a paw.

New research suggests that most modern dogs carry a small but detectable dose of wolf DNA acquired after domestication.

Dogs were the first of any species that people domesticated, and they have been a constant part of human life for millennia.

Though she may be little, this pup has a big personality. — -- Meet Thumbelina, a 1.54-pound Chihuahua puppy who now has the title of being the smallest dog ever adopted from the Wisconsin Humane ...

Many dogs love spending hours at the window, watching the world go by, keeping an eye on neighbors, wildlife, and anything ...