Supermarket Parmesan

For a cheese with all the nutty, savory flavor and crumbly, crystalline texture of the original, do the cows really have to eat Italian grass? Note: The video is incorrect when Jack states that all domestic cheeses are made with pasteurized milk. Like the Italian cheese, the BelGioioso cheese is made with raw milk. Most other American-made Parmesans are made with pasteurized milk.