A blacksmith's job includes the task of reshoing, which is the process of replacing worn horseshoes. This is a necessary part of caring for horses, as horseshoes protect the hooves from wear and tear. The blacksmith must measure the horse's hooves, select the appropriate size and shape of shoe, and then attach it to the hoof using nails. The blacksmith must also be able to trim the hooves and provide other services such as forging and welding.