And he sure is as cute as can be! Do get the Fanconi test done - for peace of mind and to ensure you give Obi the best life he can have. And remember that there are no dumb questions - if you need to know something, ask away. 
Link is about 18" at the shoulder and 30 pounds. He is a very strong dog for size, so the whole pitbull x basenji may not be far from truth. My neighbors are convinced he is what happens when you cross a pit and chihuahua (I really hope not). I've also thought about red heeler mix. At the dog park everyone asks if he is a basenji, and his trainer says absolutely some kind of sighthound mix.
On a side note, discovered this week during Balloon Fiesta that he is terrified of hot air balloons. Unfortunately the balloons have been going directly over my place the last couple of days. This has actually led to him peeing in the yard much more than usual and then running back inside to hide from the "sky monsters".
I attached a pic to help you see his relative size. He is very sad in that pic because I left outside alone for a few minutes.
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