Basenjis are unbelievably tough, my boy Sober injured a rear leg two years ago. We took him to the vet thinking soft tissue injury but the vet felt the knee had been injured. We went to an ortho vet top guy in the area who recommend surgery and reconstruction of the leg. He said he would never move correctly again and the surgery could cause other issues in his gait that could still put pressure on the other leg. We actually considered amputation. I have seen dogs recover and adapt so quickly when loosing a leg that it seemed at 8 years old (at the time) rather than months of rehab and pain it would be a better option for him.
We brought him home and started making arrangements to consult another ortho surgeon outside our area for a second opinion. We noticed he seemed better, so we waited and watched letting him decide when he was okay or not to run or play.
He is perfectly fine now. Within a couple months of quiet time he regained full use, he has not since limped or had any pain issues, he runs and plays with the young dogs with no problems, he is 10 now and doing great.
Moose may surprise you and be just fine, it will just take time.
Hug the boy for us and we are so glad he is okay. It says alot that he found his way home, you must be a really great basenji mom, but then we suspected that.
Therese and Kevin