Ask this question directly to a cow, I think that would do the trick. Cows aren't just meat...

You would probably create hell on earth and humanity would have to put them all down.

View attached image.

Don't bother the cow. It already has enough bullshit in its life.

you would need at least a dozen

You should be nice to cows, I would miss sour milk, cheese butter and milk in my everyday life. Not to forget the smell in spring :D

Does only work on Anglo-American cows...

No, but he will not sell for as much on the open market.

You should do dinner first.