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

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

Dogs are among the most popular choices when looking for furry companions. However, the dog breed of choice varies from person to person. Recent U.S. News & World Report research noted that popular ...

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

The Chihuahua breed is a popular choice if you're looking for a toy-size breed. While they might be small in size, they are big in personality and aren't afraid to let you know just how they feel.

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

Like most breeds, their exact heritage is hazy, but Chihuahuas are likely to have been established in Mexico centuries ago, where their ancestors were deemed to have sacred powers in Aztec and Toltec ...

There's a new top dog in town: The chihuahua is Washington's most popular dog breed, according to U.S. News & World Report. The chihuahua — which makes up 4% of dogs in the country — is also the most ...