Although my DH gets yearly "puppy lust", my personal rule is "I don't take any basenji under 2". By 2, their brains have developed and their attention span is longer than a nanaosecond (where you are concerned). They still have plenty of youthful energy but are not uncontrollable maniacs bent on destruction. That said, I confess I get puppy-lust myself, they are just so cute and funny and adorable. That is how they live to adulthood!
Anne in Tampa