The article I refered to was published in the BCOA Bulletin, 2014 vol 49 no. 3.
Cystinuria (particular form of bladder stone formation) can be affected by diet in basenjis per study done at the University of Minnesota and University of Pennsylvania:
"...70% of those dogs [basenjis with cystine stones] were being fed ultra-high protein kibble, conatining 33% protein and up. When diet was altered to a more modest protein level and additional moisture was added to their food, most of these dogs did not block again."
Even though a brand might say it always has this particular list of ingredients and those ingredients provide a certain health benefit, it's still good to switch around now and then so as to get other ingredients mixed in (in other words, sometimes you feed a salmon-based kibble, other times you feed a lamb-base meal, etc.).
However, I did see an article in the Basenji Club newsletter that serving consistently high-protein (over 32% I believe) kibbles over a long time can cause kidney issues in basenjis. So another reason to switch between brands or flavors.
Of my four recent basenjis, only one really yodelled and do so often (whenever I was too slow in getting him dinner :) ). My current female does not yodel, not even tries, but she does occasionally make other sounds (they sound horrible too, like a hawk just grabbed a rabbit). My first two not only never yodelled, they never made a sound.