My little Yorkie, Mandy, was very difficult to handle.  At almost 2 years old she barked incessantly at everything.  When family or friends came over she was totally out of control.  The best thing that ever happened to me was contacting Tom Mancuso and learning about his
dog training method.  After only one week she was greatly improved. After the 3rd week, unbelievable progress.  I would recommend this method to any one with dog training problems. 

Nancy
Independence, MO