I remember cutting Grasslands Acana w/scissors grrrr loll! The kibble is so dense & hard, even when I cut it up, my Momo who has tiny teeth still had a hard time chewing it. That made made me think that it would be x-tra hard for them to digest.
I also feed Canine Caviar.
The size is similar, but the kibble itself is not as dense, easily chewable.
Here's an excellent thread on kibble sizes:
http://www.yorkietalk.com/forums/yor...ce-thread.html