Can you guess my dog's breed?

This is Bella. We got her from North Shore Animal Shelter 12-14 years ago (I don't remember exactly how long ago.) We didn't know what her breed was and we were told she would likely be a big dog, but she stayed tiny. Here is the breakdown from Embark - Can you guess the breed? I was personally surprised by the biggest percentage.

31% - 13.5% - 13.4% - 12.7% - Supermutt 10.6% - 7.8% - 5.5% - 5.5% -