Shock collars

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.