Most stunning methods are not reliable  The stunning methods in general use can and do go wrong. Electrical stunning requires the right size of charge, applied to the right place for the right amount of time. If done badly, the stun itself can cause pain, and can even fail completely. In one survey of Bristol abattoirs, not a single one was fully compliant with best-practice. Captive bolt stunning must also be done at a specific point on the animal’s head. A 1990 study found that in as many as 6.6% of cases, cattle had been insufficiently stunned, and 2.6% actually had to be shot again (one reported worst-case involved a cow being shot six times).  Poultry slaughter often takes place on a mechanized production line, which causes serious concerns. Birds are dragged through an electrically charged water bath to stun them, but a 1993 study showed that 13.5% of birds were receiving shocks prior to being stunned – again, causing needless pain. Some birds lift their heads out of the bath, avoiding the stun completely. [1] Other, similar problems are associated with other stunning methods.  Religious slaughter methods ensure that each animal is handled individually, so that it is kept calm, killed quickly and is properly dead. Because of the need to comply with religious law, the overseeing bodies put a large amount of effort into ensuring compliance with best-practice. Requiring them to stun animals actually causes more harm than good.  [1] Stevenson, Peter, ‘Animal Welfare Problems in UK Slaughterhouses’, Compassion in World Farming Trust, July 2001,