Animal welfare 631 Moral and ethical aspects 196 Animal rights 180 Human-animal relationships 126 Animals 66 Law and legislation 60 History 57 Mais ... Philosophy 36 Social aspects 35 Laboratory animals 32 Religious aspects 30 Animal experimentation 28 Animals and civilization 23 Dogs 20 Livestock 20 Animal rights movement 18 Animal rescue 15 Wildlife conservation 15 Ethics 14 Animal industry 13 Animals (Philosophy) 13 Psychological aspects 13 Animal rights activists 12 Christianity 12 Conduct of life 11 Transportation 11 History and criticism 10 Human ecology 10 Vegetarianism 10 Animal welfare in literature 9 menos ...