Put another way, I love all of you dog lovers, but I have to spoil your fun a little with a fundamental truth. There is, in an important evolutionary sense, no such thing as a specific breed of dog. If a Great Dane has sex with a dachshund, you get a dog. If a Standard Poodle has sex with a Jack Russell terrier, you get a dog. If a mutt has sex with a so-called purebred, you get a dog.