A leash held at one end by a trainer and attached at the other end to a coupler which attaches to either a harness or collar secured to the body of an animal, the coupler having therein an RF transmitter that transmits a signal consisting of one or more pulsed sequences dependent on the actuation of a switch that activates upon sensing a pulling force exerted between the animal and the trainer, said magnitude of force dependent on a spring, housed within the coupler and having an associated preset tension, wherein the RF transmitted signal is received by a receiver and a transducer located in an independent correction collar that transforms the received signal to a corresponding one or more applied electrical or mechanical pulsed forces to the bodily part of the of the animal secured by the correction collar.