Yes that happens too. If she had an accident or if someone pulled her from the birth canal the hip may have been dislocated.
If the head and socket looked OK it might be possible to do what you suggest. See if this site is closer to what you are seeing
http://www.lbah.com/canine/hip_subluxation.html
If you have not seen an orthopedic surgeon with her you might want to do that.
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