I have found usually at least in my yorkies and I feed commercial kibble dog food that my yorkies teeth are typically tarter free until they mature and that is over the age of 2 years old. I have some that have more of a tarter problem than some of my others. I've tried RAW and I have found it's not for my dogs as they dont' like it AND some have digestive problems when I switch their food so I won't fix something that isn't broke. My yorkies after the age of 2 have yearly dental cleanings. Anyway that is my take and my experience
Donna Bird
Brooklynn's Yorkshire Terriers