I bought a kit and have been using it on two American Eskimo dogs and while it doesn't taste as good as malt flavor to the dogs probably (it's mint flavored) , it seems to be cleaning their teeth with continuous use every day or two. Only one problem so far was today where one dog starting coughing and finally spit up a huge foamy spit mass that when I picked it up looked like foamy tooth paste. So I'm a little worried since you don't rinse most dog teeth after you brush???? The other dog is fine.