his kind is called cornivorous bonacious
They Don't use horse shoes
you cannot use any kind of boots on your horse while showing in dressage.
Horse soap
You can use any kind of saddle providing the tree fits the horse's back comfortably.
food
I do believe that they used Spanish Mustangs.
It depends on what your vet recommends. If your horse is prone to colic you could use alfalfa. I use coastal for my horse, and it is more traditional. But if your horse has digestion problems you would use a different kind.
the Trojan horse
i am not sure.....
A halter and lead rope
A horse is measured in 'hands' - 1 hand = 4 inches (10.2 cm) The measurement is taken from the ground to the top of the horse's withers.
In its basic meaning, a dark horse is an unlikely winner of a competition of some kind. It refers to a person, and the image is taken from racing--a (nondescript?) contestant suddenly coming up from behind and crossing the finish line, seemingly from nowhere: "A dark horse candidate won the election"; "The recipient of the prize was a dark horse."[See related question in discussion section; couldn't get site to allow it.]