Originally posted by Scooby4
To figure out if the dog is purebreed or not look at the roof of the dog's mouth or tongue. If it is solid pink then it is purebreed. IF there are black or patches of discoloration then it most likely is a mix.
I don't know the science behind it but that is what I have been told. I had a purebreed Chow who's entire mouth and tongue was dark Blue color. No pink.
I think your dog may have a "Lab" cousin a line back. My favorite dog I ever had was a Golden Retriever named Scruffy. She did not look like any Golden's I've seen. So Golden's can be different from eachother but still be Golden!
Dalmatians can have spots on their toungs and in their mouths.

I think she is a purebred bred primarily for companionship or for field, and not with so much regard for conformation.