Animal Consciousness, Animal Pain and Scientific Change (1988), "Farm Animal Welfare" (1995), "The Frankenstein Syndrome" (1995), and "Science and Ethics" (2006).
Animal Consciousness, Animal Pain and Scientific Change (1988 & 1998). He has also published "Farm Animal Welfare" (1995), "The Frankenstein Syndrome" (1995) and "Science and Ethics" (2006).