Animal welfare 632 Moral and ethical aspects 196 Animal rights 180 Human-animal relationships 126 Animals 68 Law and legislation 60 History 59 更多 ... Philosophy 37 Social aspects 35 Laboratory animals 32 Religious aspects 31 Animal experimentation 28 Animals and civilization 23 Dogs 20 Livestock 20 Animal rights movement 18 Animal rescue 15 Ethics 15 Wildlife conservation 15 Animal industry 13 Animals (Philosophy) 13 Christianity 13 Psychological aspects 13 Animal rights activists 12 Conduct of life 11 Transportation 11 History and criticism 10 Human ecology 10 Vegetarianism 10 Animal welfare in literature 9 少 ...