Ben is done yearly but I know there's other horses at the yard who are done more and less regularly than that.

I get my mare's done every year and this seems to be fine for her shes about 15 or 16 years old.

young horses, older horses and some others depending on the individual horse will need their teeth checking every 6 months, and should only be done just once a year if it has been "okayed" by the dentist.