What does that mean they are "not a pure dog"? Yorkies are mixed breeds just as all of the most popular breeds right now are. I find it just plain "wrong" to somehow place a greater value on a dog who can be in a show ring than one who is born to parents who are different from each other.
I also learned and use the term "all american" to describe these beautiful babies and for me, I do not discriminate, as all dogs have value and are priceless for the love they give.
Also there are plenty of vets who will stand by the fact that all americans do have fewer health problems than purebreds.
Precious is Priceless!!!!