Help, Cat with BAD breath?

I agree with Remy. My cat had her annual check up and then I took her to a different vet (one closer to home) to have her teeth checked since I was having my other cat's teeth checked out. The new vet found a cavity and told me another tooth would probably have to be pulled because it was cracked. She has horrid breath so I'm hoping this works. BUT if you're against teeth cleaning (and I know how hard it is to do it yourself) you can try this: http://www.amazon.com/ProDen-PlaqueOff-Animal-Dogs-Cats/dp/B0030E6AS4. A friend recommended it to me, but he hasn't ever used it and neither have I. Get a second opinion before using it and read Amazon's customer reviews. Good luck!