While taking one of my equine classes at college I heard a rumor that some Arabian horses have their muzzles wrapped with a band when they are young to shape/deform them into an extreme dished shape as they grow. I tried researching this, but it seems like most, if not all, dished noses are caused by genetics (though wry nose and an instance of a foal developing with a leg over its nose did show up in search results).
I'm purely asking if people artificially alter bone conformation in horses, not to what degree an Arabian horse's nose should be dished through genetic selection (that's a whole other discussion).
I've also heard of using bustles on horse tails to encourage them to hold them higher.
Are there any other examples of this in the horse world?