[JoeyP]

This isn't really a "barking" problem persay

This is more of a socialization .... fear problem

Don't forget that Yorkies are little guys and tend to be vocal and a bit hyper
you put all these things togther and you're bound to get a barking frightened dog
If you get your pup used to meeting people and acclimatize her more she will be less likely to bark and growl
which is a defensive posture for them