Cool Do You Know How A Cow Eats Corn References. That means each cow is can eat about 18 tons of feed per year. While you may be thinking examining the corn on the cob’s color and smell may be the only ways on how to tell if corn on the cob is bad, that’s not the case.

There are a variety of options when it comes to cattle feed. Once you’re satisfied with how much grain the cows eat, you can slowly up the grain level by 1.10 lbs every second day until you reach the desired ration. But it’s not like a “wow” kind of difference.