What exactly is "ancestry"? When it comes to appearance, dogs are one of the most diverse species on the planet. In the 15,000 years that have passed since humans and dogs became BFFs, we’ve come to recognize over 350 unique dog breeds, types, and varieties worldwide. But looks can be deceiving. For instance, a Yorkie and Great Dane are actually almost identical on a genetic level. Through DNA testing, we can map your dog’s ancestry, from their breed breakdown to a multi-generational family tree.