I emailed her. Looks like a mix to me. Beautiful dog though. She said she was given the dog for free. Didn't mention the age. Not Fanconi tested.
VA-Fairfax Station-1 Yr. Old R & W Female-Possible PB-In Rescue/Needs Home
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This rescue only adopts out in the DC/MD/VA metro area. She is not listed as a mix.
Here is her petfinder ad:
http://www.petfinder.com/petdetail/22075206
Jennifer