A. How inextricably linked human, animal and pet-food supplies are. Farmers routinely feed salvaged pet food to pigs and other farm animals. There is no question that during the recall people ate meat from farm animals that had eaten pet food that contained melamine. It didn’t do any harm because it was so diluted by the time it got to us. But that was a big wakeup call for the Food and Drug Administration and U.S. Department of Agriculture.