Credit...Siphiwe Sibeko/Reuters Probably like many of you, I think of Costco as an enlightened company exemplifying capitalism that works. One ranking listed it as the No. 1 company to work at in terms of pay and benefits — a prime example of a business that is both profitable and humane. Unless, it turns out, you’re a chicken. Rotisserie chickens selling for just $4.99 each are a Costco hallmark, both delicious and cheap. They are so popular they have their own Facebook page, and the company sells almost 100 million of them a year. But an animal rights group called Mercy for Animals ...