I have an 11 year old that has lost 3 teeth to periodontal disease. I also have a 7 year old that has never had a problem.
My vet said…. "with people, you can brush, and brush, and brush but you still go the the dentist to have the plaque removed every 6 months. Some have a lot of plaque, some have minimal to none. It's lifestyle and a pre-disposition. Nothing you do can change it, you can only try to minimize the long term affects."
With that in mind, she gave me Maxi/Guard free of charge. She also wanted to document the results for her clients. She didn't want to pass on a product that was a bunch of crap.
So far, Tyler's teeth look better in the front. Left side molars look the same (crappy!!) but the right side upper and lower look and smell much better.
Ty doesn't like the application, but he tolerates it. I rub it up and under the upper gum (per vet instruction) and smear it on the back teeth.