You had me confused and then I realized you meant the write up on the other rescue (Okapi)…
I like less white also. So I had to go look... wow, coloring reminds me of minpins. :) Cute dog though.
No idea, sometimes with mixes it's so hard to tell what the parentage is. I do think that your dog's head is a bit more refined than many of the pit mixes i've seen.
I agree with the others that although he seems to have Basenji in him - his head is def. not Basenji.
As for the leg I'd have it amputated if it troubles him - He'll cope with 3 legs I'm sure, but certainly consult a specialist first. Please keep us updated.
Ha! Years ago we had a chow-shepherd mix that would pull my husband around on a bike. Great fun for both of them except for random cat sightings…then the ride got a little scary! :p