„Many dogs, cats and horses are loved and cherished, and are even mourned when they die. But pigs, chickens, calves and other animals grown in factory farms are treated in the most brutal and exploitative way, devoid of all affection. They are units in a production line; their only purpose is to produce the maximum amount of food at the minimum cost. Factory farms epitomize the mechanistic spirit. … To justify this treatment, the less-favoured animals have to be regarded as inferior, unworthy of any sentimental attachment. A terrible conflict arises if the exploited animals are considered to have any value in themselves. One way to avoid this conflict is to keep the privileged and the exploited animals in separate categories in our minds. … But if emotions spill over from pets to other animals, there is trouble. People become vegetarians, or even animal rights activists.“
— Rupert Sheldrake
Seven Experiments That Could Change the World (London: Fourth Estate, 1994), p. 24.