An important aspect of dog leashes is their sturdiness. Although rope leashes are quite cheap, they are vulnerable to chewing and fraying and are not amongst the most recommended types of leashes. However, it is considered that a better type of leash is the one made of nylon because this material provides a bit of elasticity which is meant to result in more comfort for the dog. On the other hand, nylon leashes can cause chafe or can cut into the skin of the dog.
Purposes of a leash include: preventing animals from frightening or biting people or other animals, defecating and urinating in inappropriate places, endangering traffic, digging up lawns, causing other damage, getting lost, and getting away from owners. Leashes also provide a clear method of communication and ensure control during training of dogs.
Indiana is one of the states that has a restraint statute, which means that dogs must be restrained at all times. Otherwise, if the dog bites a person when not restrained the owner is subject to civil liability and criminal penalties. (Cite needed; definition of "restraint" needed; discussion of local Indiana ordinances forbidding dog tethering needed.)