According to Spocko's Brain, the chickens are coming home to roast -- and those chickens, swine, and fish maybe tainted with melamine, a protein additive derived from coal, and cyanuric acid.
It's not just that melamine was added to wheat and rice gluten and then to pet food -- but melamine was added to wheat flour, and it's safe according to the spin at the FDA. It's a question of how safe is safe enough when you let children enjoy Faith-Based Dining (that's an overview article at Salon). While the experts may denigrate the layman perception of risk, the public knows that facts are sometimes judgments in drag disguise.
Update: oh yeah...the additives originated in China, who holds a bunch of the bank notes holding up our economy.