I can also recommend Plaque off, its fantastic stuff. i have a rescue dog she is 7 years old, when i first had her, her teeth were covered in thick scale, we were reluctant to have a dental because of heart problems, so tried plaque off. Its not an over night solution but three months later there was a Massive improvement, a year later and her teeth look like new, a good quality dried food has also helped, but the cat (now 7) also has plaque off and her teeth are pearly white. I have never brushed her teeth and she has never had a dental.