This story was originally published on The Conversation and appears here under a Creative Commons license. Intensive livestock farming is a huge global industry that serves up millions of tons of beef, pork, and poultry every year. When I asked one producer recently to name something his industry thinks about that consumers don’t, he replied, “Beaks and butts.” This was his shorthand for animal parts that consumers—especially in wealthy nations—don’t choose to eat. On Thanksgiving, turkeys will adorn close to 90 percent of U.S. dinner tables. But one part of…
