UPDATE TO TEETH CLEANING

 Last night, I tried another method of cleaning their teeth and I think it might be the one that works for me.  I put the gel on my finger and rubbed in on both sides of their back outer teeth, and then I quickly scooped some peanut butter with a spoon and just let them eat it right out of the spoon.  It covered up the taste of the gel, helped them make more saliva but swishing it around their mouth and my fingers were clean and I didn't have to wash between each dog and get the containers all sticky. And of course, I bought an organic, low sodium, low fat peanut butter.

Brushing is still the most effective and fastest way to remove the tartar but it's really hard to spend any time in their mouth and do it properly.