I personally have my guys checked once a year by the dentist. However, Annie didn't get her teeth checked for 7 years and didn't have any bad points/ridges to file down. I know it wasn't ideal, but she never gave a reason to do them, as in head tossing, spitting out grain, hay wads, etc. And my grandmother always told me it was important to do but not every single year. My dentist(very highly qualified) also said that it is better for a horse to be done consistently for 2-3 years and then checked the next year and only done if necessary. Please do not tell me I am an idiot, but I don't see the point in doing them every 6 months. Once a year I understand fully, but what is the reasoning behind every 6 months? Chopper has been checked, but not done at all yet and he will be four in April. He has no points or sores or anything like that, so I will be waiting to do his.