this site explains that there are three diffrent typed of terrier breeds. it also relates the silky terrier to the Australia Terrier since they both come from australia and the yorkie came from scottish background. i printed a phrase to maybe clarify this you can read futher if you go to the site
Because many terrier breeds are closely related and have maintained similarity in size, color, temperament, and other characteristics, it is efficient and helpful to profile them together. Thus we have the Yorkshire Terrier, the Australian Terrier, and the Silky Terrier, each with the same bold, bright terrier demeanor but with slight differences in history, temperament, health, and suitability for particular families. http://www.canismajor.com/dog/yosiau.html#Intro
hey val help us out !!!!!! i know you know the answer to this question you always seem to have the right answer. whats your take on this. are silkies and yorkies the same except for weight.