I prefer a dental spray like this one: http://www.petzlife.com
and raw meaty bones.
DITTO! Only I get the gel rather than the spray (the Tzu freaks with the spray!).
Try using PetzLife gel, you will be amazed! When I checked out their website, I was pretty skeptical, but, tried it anyway. It's nice to get a product that does exactly what they claim it does.Scraping the stuff off can be a bit freakish the first time, it is really hard (like rock) and you would swear that you are chipping the enamel off the tooth. But after a bit of scraping / picking, you will see that it is just the rock-hard plaque your are getting off.