Dog-walking need is a job that requires the use of a LEASH. A LEASH is a device used to control and restrain a dog, usually made of leather, nylon, or chain links. It is typically attached to a collar, harness, or halter and is used to keep a dog under control when walking or training. Leashes are an essential tool for any dog-walker, as they provide safety and security for both the dog and the walker.