Joan Gordons book is great and a must have by any yorkie breeder or fancier here is a link to the book if anyone is interested
http://www.amazon.com/gp/product/087...lance&n=283155
there is an older version as well
http://search.barnesandnoble.com/boo...76053606&itm=8
Funny story I would like to share, a person that refutes the "reg legged" theory is a breeder that had never heard of the "Gordon Sisters." She felt compelled to send me a pm stating the white chest marking on my puppies were a major fault and I should never repeat that breeding again. When I shared the marking explaination written by Joan Gordon her remarks were "so what their dead" dismissing their legendary contribution, valued reputation and true dedication to this wonderful breed. Just goes to show you some breeders try to have their "paws" in others business when they, themself know very little!