Sorry I haven't responded sooner. Thanks for all the thoughts!
Today we're trying an ex-pen around her crate, Renaultf1, to see how that goes. She does love marrow bones, but, believe it or not, has historically still ignored those when we're away. She goes straight into panic mode and sees nothings else! She has to be alone today for 5 hours, which is longer than she's been alone the other days. I'm worried she'll bust out of the pen, but I can't bear to think of her going nuts in her crate for 5 hours. I could probably take her too school but it seems like it would be so distracting and I feel like it may look unprofessional.
We have thought about getting a second basenji. I'm concerned her SA anxiety will continue and then we'll just have two dogs to contend with! So, DebraDownSouth thanks for the suggestion about borrowing a foster dog. That's a good idea and we may try it down the road a little.
I have decided to visit a vet to see if we can get her on meds. I'll keep you posted.