@moo98 A lot of shelter dogs are being shipped all over the country right now due to low availability in some areas. Lots of Texas rescues are being shipped to northern states due to empty shelters and rescues. Your cutie could be from anywhere if they didn't give you much history on him.
One of my Basenjis is also diagnosed with early kidney disease. The vet prescribed Enalapril Maleate (generic for Vasotec). My vet allowed me to choose whatever prescription food I wanted to use. After some research I chose Blue Buffalo BLUE Natural Veterinary Diet KS Kidney Support. I looked into and tried a more holistic food, Dr. Harvey's - a dehydrated food, but Kushika couldn't manage to eat it without getting it all over the walls, kitchen floor, and herself so we went back to the kibble. I liked the Dr. Harvey food AND you can call to talk to Dr. Harvey, who asked me to send Kushika's lab results to him so he could make specific recommendations dependent on those results. Kushika came to live with us at almost 10 years old and was immediately diagnosed with kidney disease. At age 12+ she is still with us, going strong and looking better than when she arrived.
Go to the Basenji Club of America's web site (BCOA). To find Basenji breeders go to the Breeder Directory. Breeders are listed by state. Contact the Breeder Liaison as she keeps an additional list of breeders that do not breed often and do not want their names openly advertised. https://www.basenji.org/index.php/about-basenjis/breeder-directory
Colorado Basenji Rescue has a black & white male almost ready for adoption. His name is Ranger but, from the description, he appears to need to be an only child. http://www.coloradobasenjirescue.org/adoptable.shtml
There is a Facebook European Adoption group you should join. BASENJI FOR ADOPTION-EUROPA/Adopcja basenji w Europie. Here is a link to their group: https://www.facebook.com/groups/1405065436459986/?ref=group_header
Here is a link to the Facebook Event: https://www.facebook.com/events/359744554994753/
Join the Facebook group "Orange County (CA) Basenji Meet Ups" https://www.facebook.com/groups/942444349188499/
They are trying to set up meetups at least once a month. With the COVID-19 virus meetups were on hiatus but now that some dog parks are opening up meetups for Basenjis are starting up again. I live in San Diego so I really have to think about driving 1.5 hours with 2 senior Basenjis.