Havent ever had our three's teeth done either. Zeke has some build up, and we've contemplated it, but the Vet's never suggested having it done during the yearly check ups.

They have LOTS of rubber bones, balls and such so they do lots of chewing. Bunny has always had pretty white teeth, and Eli is just a baby.. lol. His teeth are very clean as well.

We have brushed them once or twice with Beef toothpaste.. lol