I suggest once a year for floating, or at least having the vet out to check them.
Oftentimes a horse with really bad teeth will have a row of abscesses along the point ridge where the hooks were digging in. That is super painful, like a canker sore on the point of every one of your teeth. Bleh, I can't imagine!
Floating can be hard on a horse with abscesses like that. I chose a vet that uses a power drill with a float attachment...its just like a huge dentists drill, It is nicely rounded on the back side so it is much harder to do damage and scrape the cheek. Its SO interesting to watch!
Owner and head trainer of SE-Wisconsin Horse Care
*Lessons*Training*Farm/Pet Setting*Dog Walking*Equi-Eval*