We also have a possible Basenji/Terrier (Yorkie) mix. I've had some doubts, but seeing this picture of Rosie, I can't help but see my Rebel. Such a great looking dog, and if she's anything like our girl, you're in for a treat!
Just love his face, and it sounds like he has quite a personality to go with it! Great pictures - thanks for sharing. And I would love to see a wee video of him trying to snap up flies. That must be a 'howl'.