I only just started brushing their teeth about a month ago, and I try to do it nightly. Brody is the one with the tartar, and Rhianna's teeth are beautiful! But I have to say honestly, Rhianna is the only one who looks forward to it . . she actually waits in the bathroom by the vanity anticipating teeth time!
I basically have to trick Brody into doing it, he will actually hide . . .so some nights, I do let him get away with it . . .