You really think there is any dog out there whose ancestry going back 7000 years has never included a dog that wasn't of the same "pure" breed? Get a grip. There isn't even a human alive whose genetic ancestry can be documented with any certainty more than a couple of generations back. A huge percentage of babies in DNA testing studies did not have the father who was claimed on the birth certificate. I'm supposed to believe the standards are higher for dogs?
Pictures of them are chiseled into the walls of the pyramids and the DNA of mummified ones is the same as modern ones.
"Get a grip"?
My, aren't we just a rude, combative little thing.
I keep forgetting so refresh my memory...*why* are you even on this thread?