A rawhide is not going to do too much in terms of breaking tartar off the teeth, actually dry food will do a better job of this. Nylabones, hard dental chews, and CET chews with enzymes are great for this purpose, but I would combine it with brushing as often as you and your dog can tolerate it. The mouth is oddly enough the number 1 entry route for bacterial infections into the body that can cause liver and kidney disease as well as heart murmur and overall sepsis. Keeping your dog's teeth clean and healthy will definately extend its life! I mailed out a bunch of dental kits to chi-people a few weeks ago, did you guys get them? I'm all out now, if you want one, I'll let you guys know when more are available.