So just because they get some supplement at the time of milking, the butter is not good enough? Well wouldn't you have to apply that some logic to all dairy products, like milk, cream and cheese?
Absolutely. I wouldn't want any dairy from a cow fed grain especially at the time of milking. Cows eat grass, they're not supposed to eat grain. It's the grain feeding that causes milk to need pasturisation. It's not healthy for the cow, your health or the environment for cows to be fed grain.