I'm in the south loop in Chicago! Not too far
I actually have considered that she might be a rat terrier but I still cant get away from parts of her really reminding me of a B. Maybe she's a mix of the two.
Cool. Our trainer is in the South Loop. Laura Monaco Torelli. She was voted best trainer in Chicagoland Tails, and we love her (if you are looking for a trainer), she also trains for Chicago ACC, so she may know your girl.
We should meet up sometime.
Rat Terriers are a more recent breed, and there was a lot of Basenji used in developing their bloodline, which is why Lisa said rat terrier would probably mean some Basenji. http://decker-rat-terrier.com/
We are pretty sure my Petey has Rat Terrier in him. Either Rat Terrier or Jack Russell Terrier mixed with some sort of herding dog, border collie or ACD probably.
My Katie doesn't look nearly as much like a B as your girl, but we tell ourselves she has Basenji in her, whether or not it is true We base it on her voice, behavior, nightly self-grooming rituals, curly tail and lure-coursing obsession.
We have still been welcomed here with open arms. This is a great group.