The general “Rule of Thumb” is a minimum of every 6 months. Though, because significant fluctuations in weight and musculature can happen very rapidly (especially once a saddle is altered to fit and no longer impeding topline development) and rechecks and adjustments can be made as quickly as within a few weeks time! After a full re-flocking, we recommend a check and adjustment after about 30-40 hours of saddle time.