Must it be trotting? I fully admit that I don't understand the subtle differences between a lot of the horse's gaits ... trotting, cantering, galloping, left lead, right lead, etc. Dunno if it helps but, there's a horse galloping animation posted on the Fun Stuff pages. There are also some pz3 animations (horse walk.pz3 and horse trot.pz3) on the Poser3 CD in ... Cool Stuff in Here!/Sample Files/Animations