My question is...I know most of it kind of needs to be bred into the horse and it has to be their natural way of going, BUT is there anything I can do with training/exercises to encourage a more ground-covering sweeping type trot with less knee action?
Someone suggested aluminum shoes to me, but I've heard both ways - some swear by them and some say they don't make a bit of difference! My mare just got front shoes (steel) for the first time in her life (been barefoot for 11 yrs!) I don't have any "after" videos, but I do have some from just before I got them put on her. Don't really want to try aluminum unless I'm pretty sure it'll make a big difference.
Anyway, here's how she moves under saddle...(she's the buckskin):
This one was pretty darn dusty, so kinda hard to see most of it...(the barn's water truck was broken that day!)