A dog leash is a piece of cloth, metal, or other material used to bind an animal to a leash, harness, collar, or halter with a hook or other attachment. The leash is usually used to lead (ascend) or guide (gress) an animal. Leashes are sometimes used on boats and skis, but generally they are used for walking dogs, as well as many other types of animals. dog beds use leashes for hunting or fishing