After they've been electrocuted, don't forget that.reno240 said:Dude - chickens are hung upside down on a moving assembly line and their necks are then drawn across a blade cutting the heads off into a large basin.
Edit: I stand corrected. The European Union and Canada are currently using "Controlled Atmosphere Killing" in which the chickens lose consciousness and die from breathing a combination nitrogen/argon with less than 2% oxygen while in their transport containers before they reach the slaughterhouse.