Shock collar

A shock collar, also known as an e-collar, Ecollar, or electronic collar, is a type of collar that delivers electrical current to the neck of its wearer (usually a dog), in an effort to control behaviour as a form of aversive training. These collars incorporate an electronic device that can either trigger automatically as in the case of bark control collars, or electronic fence systems, or may be triggered via a remote control. Many object to the user of shock collars as animal cruelty as they can cause discomfort, pain and fear, and several countries and regions and have banned their use. Some models offer additional features such as a tone or vibrational setting that can be used as an alternative or in combination with the shock, and may incorporate GPS functionality to track the collar's location.

Shock collars were initially developed for training hunting dogs in the 1960s, and were originally designed with only one high level of power. Many modern versions are capable of delivering varying levels of shock. In areas where shock collars are legal, they are generally accessible, although Petco took the lead as the first major U.S. retailer to cease their sale. Where permitted, shock collars have been used in a range of applications, including behavioral modification, obedience training, and pet containment, as well as military, police and service training.