Hi Jenn,
Welcome to the group. It sounds as though you've adopted one of the dogs
that was posted on several lists, including this one, as a possible English
Shepherd. I do remember Jan Hilborn (who posted them on the National English
Shepherd Rescue site--Jan is the ES's fearless and wise rescue goddess)
remarking that there is a breeder in that area who breeds purebred ES with
the broken coat pattern which these two sisters had.
You might go check out the ES websites
www.uvm.edu/~jhilborn/rescue.html
www.englishshepherd.org
You'll find lots of pictures and information there, as a jumping off point.
Paige