Well, here's your big chance to weigh in, dog genealogists! What breed(s) do YOU think Zelda is?
Occasionally, she reminds me quite a bit of a Shiba Inu, especially when she's alert. When she's running, she has a sort of foxy quality that reminds of the Shiba Inus at the dog park, too. They do come in black-and-tan, so that could explain her markings, as well as her smaller size (38 pounds).
(For the record, there isn't a dog breed that I don't like as a rule, and I'm not remotely invested in what breeds she is, lol. I heart my mutt.)