Vizslas

I have a 4 year old Vizsla...who is very loving to the family, but to strangers and other dogs is really nervous around. It is a problem....she JUST got out of her cage, which she found comforting and safe. Now sleeps in our room, on her bed. Finally!
Does anyone out there have these problems with their Vizsla? Would love to hear how you handle things....probably the worst thing is she is a "counter surfer" ....She is very much loved, have had her since 8 weeks and Never abused (at least by us). would love to talk to other Vizsla lovers!