A yearling's farrier trim should feel completely routine to the horse — a non-event that it accepts as part of normal life — and achieving that requires preparation that begins well before the farrier arrives rather than on the day of the appointment. The handling work done during the weanling year ideally means the yearling is already comfortable having all four feet picked up and held. If that foundation exists, yearling trim preparation is primarily about confirming and extending that foundation. If it does not exist, it must be established before the trim.
The specific skills the farrier needs are: the horse stands quietly on three legs without pulling away while the fourth is held in a working position, holds the foot patiently for the time required to nip, rasp, and potentially shoe it, does not kick when pressure is applied to the sole or hoof wall, and can be repositioned without resistance. Each of these can be practiced in the weeks before the farrier visit with progressively realistic simulation of the farrier's actual movements.
Simulation exercises include holding each foot in the forward position that a front shoe requires, holding the hinds in the working position the farrier uses rather than just straight up, tapping firmly on the sole and hoof wall with a knuckle or wooden dowel, running a hoof pick along the white line, and holding the foot long enough that the horse learns patience. Any resistance that appears during simulation should be worked through during preparation — not left for the farrier to deal with.
Building a positive association with farrier visits from the yearling year is a long-term investment. Farriers who work with well-prepared young horses consistently do better work faster, are more willing to spend extra time with a horse that needs it, and provide better quality hoof care across the horse's lifetime.