I give my small dogs Greenies, which help their teeth. But hands down the BEST thing I have found is from
PetzLife Products Inc - "Dedicated to Improving Pets Lives.
I began using the spray every night1 1/2 years ago and the gell with just my finger 2-3 times a week at the same time. They had their teeth cleaned a few weeks ago and the vet was amazed and the improvement in my oldest's gums and teeth. She wanted to know what we were doing different.
Check out the site. It explains things much better than I could.