Inbreeding of dogs can lead to blindness, deafness, and genetic diseases. Learn how it impacts generations of dogs and what ethical breeders do to prevent it.

While some breeds are more likely to have blue eyes, says Dreger, "I don't know of a breed where every dog will have blue eyes." For example, she says any breed with a merle color pattern—a ...

Not every dog is honored to represent an entire state ... They need room to roam, preferably with a job to do. Catahoulas have a merle pattern that gives them a spotted, leopard-like appearance ...