Not only should you not breed a 10# male with a 6# female, you should really learn a lot more about breeding in general before considering it at all. Here are a couple links from the YorkieTalk Library that will give you an overview of some of the other factors to consider. I sincerely hope that you will consider having your Baby spayed, and just let her be your adored little girl, and not put her through the risks of pregnancy.
http://www.yorkietalk.com/forums/bre...-answered.html http://www.yorkietalk.com/forums/bre...t-breeder.html