ITK, we have a cat who we've been told at some point should get his teeth cleaned. He only chews on one side of his mouth so the other has more plaque. The vet told me that the other option was for me to teach him how to chew on the other side of his mouth
! Anyway, DH is really hesitant to do this because of the anesthesia. Reagan is almost 10 so we hate to tax his system any more than we have to. We've decided against it, at least for now.
My own opinion, for what it's worth, is unless the vet says it's medically necessary to have their teeth cleaned, I'd hold off. Just make sure they eat dry food and some treats or chews that are made for tartar control and hopefully that keeps it in check.
Give your pups a pet for me!