Interesting NY Times article http://www.nytimes.com/2009/12/22/science/22angi.html?_r=1 about how plants try to protect themselves. This is something I argue in "The Asian Diet". I believe that God loves carrots too; and that a carrot would rather stay in the ground than be pulled up and chopped into my salad. It is not possible to Do No Harm and stay alive; so that is not the goal. The goal is to be thankful and mindful for everything that has to give it's life so that ours may continue.
Most Americans have way too much meat, and that is clearly not good. Vegetarians go just a little too far to the other extreme. Balance and moderation is best in most areas; including meat consumption. As one famous Chinese medical author wrote, "Vegetarianism is best suited for monks, living in the shelter of a temple and spending their days in seated meditation". Those of us with a more active lifestyle need a little bit of a more active food source.