A pet-food manufacturer recalled 60 million units over the weekend after at least nine cats and a dog died of kidney failure. No one has identified the source of the contamination, but the company said the recalled products included a suspect batch of wheat gluten. What else goes into pet food? Thanks to the U.S. Food and Drug Administration—which oversees the pet-food industry with the advice of the Association of American Feed Control Officials—the list of ingredients on a tin of dog chow gives you a general sense of what's inside. But pet-food companies manipulate the order of the list such that meat (and meat byproducts) appear first, even when other ingredients are used in larger quantities.