We stopped eating meat many years ago. During the course of a Sunday lunch we happened to look out of the kitchen window at our young lambs playing happily in the fields. Glancing down at our plates, we suddenly realized that we were eating the leg of an animal who had until recently been playing in a field herself. We looked at each other and said, "Wait a minute, we love these sheep-they're such gentle creatures. So why are we eating them?" It was the last time we ever did.