Horseshoes are man made, u-shaped plates fastened to the bottom or ground side (also called the palmer) of a horse's hoof and secured with nails or glue. These plates are most commonly made of steel or aluminum but can also be made of plastic, rubber, and copper. Horseshoes are made and applied by farriers, a person who shoes horses and ensures that the fit is right for your horse. Temporary shoes are often fastened with glue, while shoes worn more regularly are fastened with nails that are painlessly secured by the horse's hoof. A horse with shoes is called a shod horse, and one without shoes is called unshod or barefoot.