Thanks for the replies.
I have now spoken with the BRAT screener, who given me information about the local BRAT contact. She informed me that rescue basenjis can be younger, about 9 to 18 months old. Is this typical?
As for the breeders, Sherwood has a R/W female puppy that I might pursue if she is still available later this year. Also, I understand that basenjis often have litters in winter. I'll be keeping an eye out when new babies become available later this year.
What is everyone's advice about the age of a second basenji? Is it usually better to have an older female, or a younger one? Atom's temperament is, above all things, playful. He is not aggressive or dominant, but loves a good chase game with other dogs. Any tips would be appreciated.