I've owned dogs for over 70 years. Fed them large dry hard kibbles and beef bones and their teeth were always shiney white. Are some breeds just more suseptable to tartar problems? I bought a 1 year ACD about 3 years ago from a breeder. When he arrived his teeth looked terrible. Looked like he was living in a 3rd world country for the first year of his life. Now his teeth are bright white and I don't see any tartar after changing his diet for a couple of years. Told my dentist I'm gonna start eating kibble and dog bones to make my teeth look that good.:B Yep, got a lecture about that diet would't be good for humans. :S