We have lots of <phew!> dairies around us, so there's tons of acreage of feed and sileage corn.
They chop it green haul it to the dairy where it's stacked and covered...wet & green. Sileage stinks...kind of sour/rotten.
Living in the almond capital of the world, lots of the dairies mix almond hulls in their feed. Supposed to be VERY good for the cows. (not the hard shells, the outer hull...kind of a leathery husk)
There's one cattle ranch not far from us that buys tomatos and fruit that don't meet the cannery's specs and feeds those to his herds as well.
BTW, $3.00 for a gallon of Sunnyside 2% this afternoon.