Sorry, but I can't get too enthused over animated horses
. As a series of drawings they just have no hope of measuring up to the real thing
But Disney did use real horse in many movies.
Pretty much any of the stallions in "The Miracle of the White Stallions" will do it for me (but they are even more impressive in person if you ever get the chance to visit the Spanish Riding School in Vienna). I also thought the horse in "Wild Hearts Can't Be Broken" was pretty good. I don't think I'd ever be able to get one of mine to jump into that tank.
The "old stallion" in "Return to Snowy River" would have been good if Disney hadn't Disneyfied him by making this older, feisty, feral stallion that had never been ridden suddenly turn into a horse that can be saddled and ridden like a well trained horse in two brief session that totaled maybe an hour of the time portrayed in the movie.