I'm watching the Grand Prix Dressage right now and I have a question about the pirouette. I know it is supposed to be a highly collected maneuver done at the canter. Now most of the horses I've seen go in the oylmpics perform it as a four beat gait, where the hind right strikes, then the hind left, then the front R, then front L, rather than the R hind, diagonal pair, and front L. Is this common for most dressage horses? Also are there points deducted since technically the horse is no longer performing a three beat canter? And then a similar question regarding the piaffe. I know it's the highest collection a horse can do but in some cases the hind hoof of a diagonal pair will touch a moment before the front hoof. Is this also a deduction? Thanks for any help