Never, unless there is a problem. Hobo had his done about a year ago, but he had one that needed to come out. Ended up being 6 that needed to come out! They get lots of bones and chewies. That seems to keep their teeth shiny clean. Heyoka has a note on his vet file that his teeth are "abnormally white". He looks like he uses Crest Whitestrips every day!

Dental work is so ridiculously expensive that I am very glad they don't have on-going teeth trouble!