Some farms may choose to feed their cows small amounts of organic corn (for energy) or soybean (for protein.) Most of the time these are grown on the farm or on a neighbor's organic farm. This may be necessary during winters when the cows need some extra energy that they can't get from fresh pasture grasses, legumes, and forbs. It's similar to humans eating dark organic chocolate in the winter to pick their mood up. That's not bad for a person's health whereas eating dozens of processed milk chocolate per day would be. :)