@tanza Thank you for your reply The breeder only tests for Fanconi. So no other tests have been done. Is that unusual?
A responsible breeder tests their dogs for not only Fanconi but for PRA (another DNA test for night blindness), Hips, Thyroid, Eyes. See the link on one of my Basenjis and the testing that has been done. https://www.ofa.org/advanced-search?f=sr&appnum=1415062
In regards to waking a pup to potty at night, my Basenjis (been in the breed since 1991) sleep in crates in the bedroom as pups. I have found with all my Basenjis, a quick wake up, quick potty, they go right back to sleep now without a full bladder. To each their own, this has worked for me, especially if you are crate training