evidence: Some rodenticides contain sodium chloride—table salt—and corn gluten meal. This combination forms a thick plug that physically obstructs the airway of rodents. Because rodents are anatomically unable to vomit, this leads to suffocation and death. These rodenticides aren’t hazardous to other animals and humans, who are physiologically different from rodents. Humans can safely eat processed food containing sodium chloride and corn-derived products, as long as they are part of a balanced diet.