Welcome. Thank you for taking in that poor little dog. Is she a puppy mill breeder? Sounds like she was kept caged most of her life. There is a thread in the "sticky" area of the general training fourm about working with puppy mill rescues. It may have some helpful hints for you. Best wishes for you and your little furry family!
http://www.yorkietalk.com/forums/gen...nt-advice.html