My greys had their teeth done when they came off the track. Some people have their teeth done yearly. I have'nt had the girls' teeth done since we adopted them. I just don't want to put them under every year if I don't have to. I figure that since I check their teeth regularily that if there seemed to be a problem then I would get them done. Our lab is going to be 11 and her teeth are really white and in great shape. I think that with each breed and each dog it differs.