Hi
I used to feed Innova Evo and I would def go with the small bites. I kind of think of it that if I had a Lab or a larger dog like that I would choose the large bites. All Yorkies in my opinion should have the small bites. Some do like the chewing on kibble, but I'd be scared about them swallowing a piece that maybe too large.
Smiles-
Snick & Viv