If you are concerned about dental health then making a full switch to a raw diet with bones included would be the best thing. Kibble is actually not good for the teeth like the manufacturers claim. In fact it does the oppsite. It is very abbrasive on the teeth causing chips to the enamel and the carbs in the kibble stick to the teeth and cause tarter buildup. My 8 year old ferret got mistaken as a baby when she went missing last year based upon the condition of her teeth because she has been on raw for 2 years.