That kibble shape sounds as if it would be the Zupreem.  If I remember
correctly, I think that the 8 in 1 Ultra Blend is also in a similar
shape.
 
I DO know that my ferrets are SO picky when it comes to their kibble and
the shapes.  They seem to prefer any shape but round.  When I clean their
area, I find that the round or tubular shaped kibble is always all over
the place, yet I don't find any other shaped kibble (unless it falls out
of the dish).  Picky, picky picky.
[Posted in FML issue 4754]