That latest issue of "Tony Stark: Iron Man". The one without Tony Stark. Instead, it had his recently discovered brother Arno, who's been travelling the world and solving corporate problems. Or dispensing Twilight Zone justice. It depends on the situation. In this situation, he let some farmers get eaten by the brainless cows they'd raised to alleviate meat guilt.
But the most amusing thing about this might be the idea that scientists in the Marvel universe, known for a fairly noticeable pervasion of advanced technology, thought that brainless cows were the best way to get around the guilt of killing sentient beings for food. The real world's already focusing on growing meat without animals! But nah. Arno's clients still wanted to have things to farm. Maybe that was their real goal. It wasn't to feel better about eating animals. It was to feel better about living that old rancher life without the idea of imprisoning thinking beings.
Brainless cow versus cowless brain!
It depends. Does the brain have the kinds of powers that are usually ascriped to independent clumps of cerebral matter? Like levitation and mind bolts? If it doesn't, the win goes to the cow.