The Tropiclean Fresh Breath Clean Teeth Gel is great for removing plaque, tartar, and nasty residue from your dog or cat, while also keeping gum diseases at bay. Here's an excerpt of a positive review we found on Amazon:
"I was pretty skeptical at first. I work at a Vet's office and have found that A LOT of these products out there do not work through many clients who have tried them. But, I tried it out because some of our clients were saying that it was working for their dogs. They were so excited to find a product that actually worked! I had just had my dog under for some serious ear cleaning from a lot of wax stuck down right at the ear drum and I didn't want to put her back under anesthetic so soon. So, I tried this Tropiclean Fresh Breath Gel. I followed the instructions of putting the Gel over my dog's teeth in the evening and brushed them in the morning for 1 month as directed. The idea of this Gel is that it works with the saliva and helps to soften the tarter on the teeth so that in the morning you can brush a small layer of tarter off. It doesn't promise to take it completely off in 1 day or 1 week. They recommend you try this for at least 1 month every night and day. I found that it worked very well. I would put it on her teeth at night which made her produce a lot of saliva and she would lick a lot. After that, I did not allow her to drink any water (as directed) until the morning when I would then brush her teeth. After 1 month there was no plaque on her back teeth. "
Source: http://www.amazon.com/Tropiclean-Fresh-Breath-Plaque-Remover/dp/B00379KT66