I sure don't know BUT am interested in what folks have to say on this. In every issue of my Cesar's Way magazine, there's an ad for this product: "Leba III". I've seen it in other dog magazines too. They always have full page ad (expensive) and offer plenty of "proof" that the stuff works in pictures and stuff. I wonder if that stuff is any good? Has anyone else used LEBA III? This stuff was supposedly invented by someone who lost a dog to tooth decay -- unnecessarily of course -- and how the product was invented....? Lots of info came up when I googled it and its supposed to be "natural".