Roger Scruton

If animals are conscious, then they feel things—for example, pain, fear and hunger—which is intrinsically bad to feel. To inflict deliberately such experiences on an animal for no reason is either to treat the animal as a thing or else in some way to relish its suffering. And surely both those attitudes are immoral.

Roger Scruton, Animal Rights and Wrongs, 2nd ed., London, 1998, p. 21