Head-only electrical stun

that will render the animal unconscious until sticking causes it to die through exsanguination. The basic principle is that an electric current is passed through the brain, disrupting the normal brain function. There are two basic methods of delivery—head only, and head-to-back. Stunning currents are supplied either as alternating currents (AC) or pulsed direct current (DC). The usual frequency is 50 Hz AC, which is the mains frequency. More recently, researchers have developed high-frequency stunning systems which aim to reduce meatquality problems associated with electrical stunning.