Abstract: A system for controlling the movement of an animal relative to an area is provided having a signal transmitter with a transmitting antenna associated with said area. A loop of wire serves as the transmitting antenna and defines the boundary of the area. An electronic receiver carried by the animal is responsive to a signal produced by the transmitting antenna for producing an animal control output, such as an annoying tone or an electrical shock, to the animal whenever the animal moves into the vicinity of the transmitting antenna.The electronic receiver has first and second orthogonal receiving antennas for receiving the signal produced by the wire loop antenna. Each antenna receives a respective component of the transmitted signal. Selection circuitry selects which of the respective components has greater magnitude and produces an actuating output to identify such component.Switch circuitry receives the respective components of the transmitted signal from each of the respective receiving antennas.