The Yorwich is not a pure-blooded canine. It is a cross in between the Yorkshire Terrier and the Norwich Terrier. The very best method to identify the character of a mixed breed is to search for all types in the cross and understand you can get any mix of any of the qualities discovered in either type. Not all of these designer hybrid pet dogs being reproduced are 50% purebred to 50% pure-blooded. It is really typical for breeders to reproduce multi-generation crosses.
Mixed or Designer Dog Breed Registries
ACHC = American Canine Hybrid Club
DDKC = Designer Dogs Kennel Club
DRA = Dog Registry of America, Inc.
DBR = Designer Breed Registry