Water probably
The forgotten nutrient and the most important is water.
The most important gat of a draft horse is a trot
Calcium
carrots
Vitamin k
yes
yes
An important nutrient would be beta carotene, which the body uses to make Vitamin A.
which nutrient supplies the body with the most calories
Carbon, Nitrogen, Oxygen
Protein and fiber are the most important. There are also amino acids and such.
A horse.