Basic shoeing of a horse includes trimming the hoof itself. The sole and frog are trimmed away, with length of the hoof depending on the needs of the animal.
All horses will shed their frogs naturally, but often a farrier can aid in this process. A shoe is then fitted to the animal.
Shoes come in a variety of pre-made sizes, weights, and thicknesses.
Learn more here Shoeing a Horse – Comfort and Corrective Shoeing (professorshouse.com)