Okay so here is the deal:
My horse was broke a year ago in an arena, and never seemed unwilling or lazy. In fact he would rather move out nicely than stand still or mozy along dragging his feet.
Since then we've done a ton of trail riding and riding out on the roads- no arena. Now, When we go to lessons, we're riding in a dressage sized arena and he gets the lead feet. He drags his feet terribly, trips, hardly trots, and you REALLY have to get after him to canter. It's not a conditioning problem at all- we ride for hours at a brisk trot on the road. It's a lazy in the arena problem :( What have you done to get more 'pep' in the dressage arena?