To begin a small aside which approaches speculation. Just a moment ago I watched an interview with Dr. Rüdiger Dahlke, whose approach is explained in the book "Peace Food". Even the most optimal means of feeding (feeding cows with grass) does not change the fact that animals which are used for consumption ultimately end up in the slaughter house. Even the small percentage of animals which are slaughtered in the most humane way possible go through extreme stress and fear. These fear and stress hormones are not simply diffused; instead, they are consumed by humans when they eat meat.