Sorry Maggie & Bogie, I think you may be related:
Recent DNA analysis confirms that the ancestors of today's Shih Tzu breed are among the most ancient of dog breeds. Ludvic von Schulmuth studied the skeletal remains of dogs found in human settlements as long as ten thousand years ago. Von Schulmuth created a genealogical tree of Tibetan dogs that shows the "Gobi Desert Kitchen Midden Dog", a scavenger, evolved into the "Small Soft-Coated Drop-Eared Hunting Dog" which evolved into the Tibetan Spaniel, Pekingese, and Japanese Chin. Another branch coming down from the "Kitchen Midden Dog" gave rise to the Papillon and Long-haired Chihuahua and yet another "Kitchen Midden Dog" branch to the Pug and Shih Tzu. The Shih Tzu was almost completely wiped out during the Chinese Revolution. Seven males and seven females were saved, and today, all shih tzus can be traced back to one of these dogs.