What's fascinating here is that the problems he finds have less to do with animal abuse (Maryn McKenna reports that Conover was surprised to find himself in a clean, safe, humane facility) and more to do with the abuse of antibiotics — a trend that is a major contributor to antibiotic resistance.
You can't read the full story for free, unfortunately. Such is the way of Harpers. But Maryn McKenna has a summary, Conover has a blog post on agribusiness gag laws, and you can buy access to the full story with a Harper's subscription.
Maggie Koerth-Baker is the science editor at BoingBoing.net. She writes a monthly column for The New York Times Magazine and is the author of Before the Lights Go Out, a book about electricity, infrastructure, and the future of energy. You can find Maggie on Twitter and Facebook.