Did We Run Out Of Cows??

We just made a cross country trip via New Hampshire to Washington and back and stayed off the freeways for the most part...and let me tell you of the 8000 miles, Ill bet 1500 miles was planted in corn. We saw corn planted in just about every state with the exception of Idaho and I'm sure someone there also grows it. I was amazed and I'm wondering who could eat all that corn, and then I remembered ethanol and animal feed and corn oil and high fructose corn syrup and the list goes on.