Ten years ago 70-year old Christopher Horan didn't know what a vegan was. If pushed, he'd have guessed they were an unhealthily thin, deadly earnest, dour disapproving types who looked down their noses at the greatest pleasure of man and beast, eating with gusto.So there had to be some good reasons for him to become one of them and follow the mantra: 'Eat nothing with a mother or a face.' A rule he's tried to follow for the last ten years.However, before embarking on his li...