The invention provides a device for use in partially or fully immobilizing animals such as cattle, sheep and the like. The device includes a probe for insertion in the anal canal of the animal the probe comprising a pair of spaced electrodes connected by way of electrical conductors to a power source. The power source providing a pulsed electrical current having a voltage of between 2 and 10 Volts and a frequency of between 20 and 50 Hz to the electrodes.