I found this website 
http://www.canadasguidetodogs.com/nationalclubs.htm 
Under the B's there is a foreign registry with the abbreviation BCU.  Do you think that could be it? 
Hope Natalie's doing okay.  Sorry the thread earlier got so out of hand.  Just wanted to say that I got the answers I needed and I don't have any doubt in you. Please keep us updated on her. She's such a sweet little girl 
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 ~Magnifique Yorkies~
 Purchasing from backyard breeders, pet shops, and puppymills perpetuates the suffering of other dogs.
Educate yourself and buy from reputable breeders or rescue.