i just got back from the pet store and while I was contemplating which toothbrush i wanted to try next for Spencer, the helpful attendant told me about ProDen Plaque Off. It's a natural seaweed product that you mix with food and it helps decrease the amount of plaque without brushing.

http://www.plaqueoff.com/proden_plaqueoff_animal/proden_plaqueoff_a...

Has anyone here used it before??