USDA : Cattle must be able to walk to slaughter ; slaughter is for ` ` . '' Without USDA inspectors on site , the plant is not allowed to operate . Rule was instituted to protect food supply from spread of mad cow disease . Critics say no downer cattle should be introduced into food supply .
USDA : Cattle must be able to walk to slaughter ; slaughter is for ` ` . '' Rule was instituted to protect food supply from spread of mad cow disease . Critics say no downer cattle should be introduced into food supply .