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A horseshoe is a U-shaped piece of iron, rubber, plastic, rawhide or a laminate of these, nailed or glued to a horse's hoof--very like a shoe. Early horseshoes had "calkins" or protruding tabs at the ends of the shoe to provide additional traction. Kept as a talisman, horseshoes are said to bring luck.
Since the early history of the domestication and use of horses, many factors have contributed to the need for the bottoms of domestic horses's feet (hooves) to have additional protection over and above their natural hardness.
Live grasses, weeds and shrubs, which are eaten in the wild, are high in nutrients such as beta carotene. Cultivated feeds lose a high proportion of their carotene within hours of harvesting, and so do not provide this vital ingredient to the horse. The hoof is made of horn, much as the human fingernail, and grows hard, tough and flexible only with optimal nutrition.
Horse shoes are not needed in nature as the horse walks and graze s continuously over a wide variety of surfaces. The consequence of this nonstop travel on the horse's feet is to keep them worn to a small, smooth, even and hard state. The continual stimulation and irritation of the sole of the foot keeps it thick and hard, much like a callus.
However, in domesticationDomesticated animals and plants are those whose collective behavior or life cycle has been altered as a result of their breeding and living conditions being under human control for multiple generations. Humans have brought these populations under their ca, the customary amount of ground covered by a horse on a daily basis is greatly reduced. Therefore, the hooves harden much less and are more vulnerable to injury.
Horses's hooves can become quite worn out when subjected to the added weight/stress of a human, pack loads, cart or wagonA wagon (in old British English waggon is a wheeled vehicle, ordinarily with four wheels, usually pulled by an animal such as a horse, mule or ox, which was used for transport of heavy goods in the past. A wagon is also a large wheeled container that is u traces.
Horses have moved from the more arid steppes to the wetter climate of northern Europe. This wetter climate softened the hooves, making hoof protection necessary, and consequently it was in northern Europe that the first practical horseshoe arose.
In captivity, absent the natural conditioning factors present in the wild, the feet of horses grow overly large, long, fragile and soft. Hence, protection from rocks, pebbles and hard, uneven surfaces is lacking. Cracks in overgrown and overly brittle hoof walls are a constant danger, as is bruising of the soft tissues within the foot because of inadequately thick and hard sole material.
Horse owners have sought to remedy the problems shown above with supplemental support and armor, beginning in the earliest days with rawhide boot s which could be tied onto the hoof.