Adam Danforth is the the author of "Butchering Poultry, Rabbit, Lamb, Goat, and Pork: The Comprehensive Photographic Guide to Humane Slaughtering and Butchering." "It's not ironic or a coincidence that an an animal that has a better life tastes better," says Danforth, who is an advocate for eating older animals and argues working muscles create flavor.