Apparently you didn't read the link, or you would have known that feed is defined in the article as corn.
Everyone states corn. They should say feed. Corn is not the only feed that will make them go nocturnal. There is no ONE food that will make them go nocturnal and you can feed others and they won't. Corn is not making them go nocturnal, feed is making them nocturnal whether its corn, soybeans, etc.
