Huffington Post: Nicholas Kristof’s column on Wednesday discusses the recent work by animal activists on behalf of chickens and pigs, and the degree to which “animal rights are now firmly on the mainstream ethical agenda” in the United States, as they have been for some years in Europe. I am delighted to see from Mr. Kristof yet another thoughtful essay about a moral issue that is, until recently, not widely discussed, and even more pleased that in discussing the cruelties of modern intensive farms, he is …