Why are IAMS pet food tainted? What caused them to be tainted?

They are not sure yet, but right now they think that some equipment was tainted in the processing of the wheat gluten (a thickening agent). I know it's scary; I have five cats and they eat Eukanuba, but the dry food (I'm scared anyway). If your cat is not showing symptoms, he is fine. The problem the food is causing is renal (kidney) failure and the symptoms are severe and immediate. If you can find another food not on the list that your cat likes, go with that. But remember, this happens, even with people food (just ask Taco Bell!). In a short period of time, IAMS will be safe again and I'm sure they will be even more diligent. Good Luck!