I have used Fromm's Surf & Turf for a couple of years now and I am thrilled with the results...appearance and overall health...of my girls. However, the kibble pieces are tiny (about the size of a flat pea)...which was great when they were small and for Peanut...but my girls are now on the 'plus' side

For Peanut the kibble is fine because his mouth is tiny and it probably gets the side surfaces of his teeth but with the girls the pieces are too tiny and they only chew them on the flat, top surface of their teeth so it doesn't help clean the sides at all. We need a bigger kibble for them to help clean their back teeth. I don't want to switch from Fromm's so does anyone know of an excellent kibble that has larger pieces that I could mix in with the Fromm's?
I talked with a Fromm's rep and she said they don't make the S&T in larger kibble..she was absolutely wonderful and even sent me bags of each of their grain free treats and the girls love them...but I would like to give them something more than a treat or two a day to help clean their teeth.
We tried the CET chews but they aren't chewers so that didn't work so well.
Anyone have any ideas?