I'm neither vegan nor vegetarian, but I am upset that most pigs are slaughtered by lowering into a pit of carbon dioxide, which causes them to choke to death. Anyone who has inhaled a lungful of CO2 will know how painful a death it will be. CO2 causes an immediate, involuntary exhalation and this is followed by a desperate need for air and the cycle repeats. I'd rather they were shot or beheaded. Why can't humans and animals be euthanased by hypoxia? This involves slowly lowering the available oxygen which leads to unconsciousness and death ina peaceful way.