From the pic she seems to have the Yorkie coat, and everything else! She is certainly very cute! Is there any way you could take her for a week or so on a trial basis? Or maybe you could spend the day there with her and take her for walks, play with her etc. I'm afraid based on that pic alone I just could'nt resist
I have had dogs with behavioral issues in the past (my OESD Owen is one of them
) sometimes if the bond is right you can work through some of the issues and learn to live with the rest
Good luck with your decision and keep us updated