Horseshoe consists of two layers. The first layer in contact with the ground is a hard stratum corneum about 2-3 cm thick, and the upper layer is a living stratum corneum. Horseshoe comes into contact with the ground, and will fall off quickly due to the friction of the ground and the corrosion of accumulated water. The main purpose of nailing horseshoes is to delay the wear of horseshoes. The use of horseshoe not only protects horseshoe, but also makes horseshoe hold the ground more firmly, which is beneficial to riding and driving. Horseshoe is a horseshoe, an iron hoof tied to the hooves of horses, cows and other animals. Horseshoe mainly protects horseshoe, and minimizes the damage to horseshoe caused by contact between horseshoe and ground, ground friction and water corrosion. Under special circumstances, horseshoes can also be used as weapons. When nailing horseshoes, it is mainly to remove a thin layer of aging keratin, just like people cutting their nails. The proper method will not hurt the horseshoe. So many people think that the concept that horseshoes are cruelly hammered into the soles of horses with hammers and nails is wrong.