Uh, where do you think Vegan friendly foods are grown? Do you realize that the earth must be cultivated to grow the vast majority of these foods? Do you think farmers of these foods take kindly to crop damage from wild animals?
Beef cattle do not require farmed grain, in fact many graze only beef farms exist and the practice continues to gain popularity.
I respect your choice to be Vegan, please respect my choice to reject lab grown goop.