Sometimes it is difficult to believe that all dogs are related. How can the tiny chihuahua be from the same species as the massive Great Dane? A male beagle is usually between 14 and 16 inches tall; a ...

Dogs today come in a mind- blowing array of shapes and sizes, but when did this diversity in canine forms begin? New research ...

Selective breeding of toy dogs is now resulting in a common condition that can cause skull and brain changes with painful and debilitating effects, a new British study finds. The condition, called ...

Dear reader, I recently wondered why pet dogs come in so many uniquely different shapes, sizes, and colors, while cats look so similar to each other. For instance, Great Danes and Chihuahuas are ...

If you've ever wondered how your pooch flashes those "puppy dog eyes" that melt your heart, a new study may provide some answers. The researchers identified certain muscle features that help dogs look ...