awww. Yeah, a lot of yorkies think they're rotties or something. But there are also some who are a little more shy or timid. I have one of each. I don't think they feel like they're being picked on or anything, but I think they just feel more comfortable with the people they know and love. and maybe they are a little nervous.
and I don't think the other dogs are barking at her because they don't like her. If she's nervous or jumpy, they can sense it. So they are probably just responding to that.