@branch - Typically these are fatty lipomas. These happen in all older dogs, not just a Basenji. As your vet recommended they do not need to be removed since showing benign. If they are really unsightly for you, if you need to have something else done that he would need to be put under, you can have them removed then. Other than that, I would not worry about them. Just keep an eye on them. You can always have your Vet check by doing a needle extraction
This is Tanza Basenjis, I believe that I have replied to your email that we have not decided if we will be breeding this year. That said, if you are not getting responses from the other via email, you might want to try calling. Note also that All Star Basenjis is not a responsible breeder and goes by many different names. I would say to stay far away from them. Also Mountain Springs in California is not a responsible breeder and many of their Basenjis have wound up in rescue, they do not health test....
www.basenji.org you can search for breeders by state. There is also a link on how to "vet" breeders, question you should ask. https://www.basenji.org/learn/ScreeningBreeders.htm
Also check out health testing yourself. You need to have the registration numbers and/or registration name and you can check at www.ofa.org
Here is the link for questions to ask breeders. Do not just "take" their word for testing, check it out for yourself. Here is a link to one of my girl with her health testing results https://www.ofa.org/advanced-search?f=sr&appnum=1415062