I've had Stomps' teeth cleaned at least twice. Each time, within a couple of months, the vet was on me again to have them cleaned again. Stomps develops tartar incredibly quickly. But he's a rescue, and I think he was horribly neglected as a youngster and probably didn't get the appropriate nutrition, so now his teeth are rotting (he's at least 12 years old). That being said, he's always tolerated the anesthesia and he's perfectly find afterward. I've had Lightning's teeth done at least once, and he's never had a problem either.