Swedish animal environment and health researcher, Sophie Atkinson says it is difficult to determine the most humane manner in which to incapacitate pigs before they are slaughtered.
According to Atkinson, global industry needs to invest in research and technology to established new pain-free practices for animal abattoirs.
In the CO2 method, pigs are put into cages, then lowered into a pit with a concentration of carbon dioxide higher than 80%. As they go down they start to sense the gas and once at the bottom, they lose consciousness. There is no doubt that there is a period of suffering and anxiety.— Sophie Atkinson, Swedish animal environment and health researcher