New Scientist: Might “pain-free” be the next sticker slapped onto a rump roast? … Progress in neuroscience and genetics in recent years makes it a very real possibility. … “If we can’t do away with factory farming, we should at least take steps to minimise the amount of suffering that is caused,” says Adam Shriver, a philosopher. … [who] contends that genetically engineered pain-free animals are the most acceptable alternative. …