Chealsie, the kind I have you just sprinkle on their food. It's green, and I thought Ava wouldn't touch it, but I mix it into her kibble and she doesn't seem to notice. I keep it in the treat cabinet, so maybe she thinks it's supposed to be yummy! Her big girl teeth are brand new and sparkly, so time will tell if that's enough. If I had to brush her teeth often, I'd lose a finger. She's the mouthiest dog I've ever seen!
I used the Virbac C.E.T. Oral Hygiene Rinse with Spencer and will probably finish out that bottle with Ava. You just squirt it into their mouth every day, and it helps stop plaque from forming. It made a difference with Spencer, and it was so much easier than brushing every night, which is difficult to do! Maybe the rinse would be easier with Oakley?