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.
Actually, Ikea is my first choice for a new couch. Only because you can easily buy the replacement covers/parts ahead of time and keep them handy for "future repairs".
I thought about leather, but I fear the costs to have it repaired in the future. My B only does some "digging" where he likes to sleep.
We got Killian from a breeder in Ohio–-Jim Edgerton. That's where he had gotten our previous male basenji. We took Logan and Jasmine to his place and looked at several 1 year olds and a puppies and Jasmine eliminated the others and we agreed with her pick.