If you want a cow to be not just a cow but a milk machine, you can do a very good job at that by creating new hormones like the Bovine Growth Hormone. It might make the cow very ill, it might turn it into a drug addict, and it might even create consumer scares about the health and safety aspects of the milk. But we've gotten so used to manipulating objects and organisms and ecosystems for a single objective that we ignore the costs involved. I call this the "monoculture of the mind."