Neither metal nor rubber is universally “best”; the right material depends on the horse’s job, footing, and hoof condition.
Metal horseshoes, usually steel or aluminum, are the traditional choice. They are durable, offer strong protection against wear, and can be shaped precisely by a farrier. Steel is especially good for heavy work, rocky terrain, and horses that need long-lasting support. Aluminum is lighter and often preferred for racing or performance horses where reducing weight matters, but it wears out faster than steel.
Rubber shoes or rubber-based hoof boots are softer and provide more shock absorption. They can improve comfort on hard surfaces and may be useful for horses with sore hooves, thin soles, or temporary protection needs. They also reduce noise and can be a good option for horses that do not tolerate metal well. However, rubber usually does not last as long, may not provide the same level of traction or custom fit, and may be less suitable for intense work or rough conditions.
In practice, “best” depends on the horse’s needs. For most working horses, metal shoes are more versatile and durable. For comfort, rehabilitation, or occasional use, rubber can be better. The ideal choice should be made with a farrier and veterinarian, based on the horse’s conformation, workload, and hoof health.