Shows how much Schumer knows about farming. Most SANE dairy farmers grow their own corn/ feed crops, so commodity prices don't effect them. Input costs do.
Schumer is also pretty stupid thinking Ethanol production even interrupts commercial feed production. Only the starch is processed from the corn and used for ethanol, the corn and tailings from ethanol yeast etc. continues on to be used for feed production.
Typical knee jerk liberal reaction.
But not all dairy farmers do raise all the feedstock they need so they buy it in a market whose prices are inflated by a government program which burns those feedstocks. Similarly, not all beef producers grow all the feedstocks they need and they too must enter the marketplace to buy increasingly rare feedstocks because much of the feedstocks have been diverted for subsidized biofuels.
Many sane dairy farmers, being sane, find they can make more money by selling their feedstocks for biofuels if they reduce the size of their dairy herds, so they do so thus further driving up the price of milk-and beef