- National Council for Animals' Welfare51
- Royal Society for the Prevention of Cruelty to Animals11
- Animal Welfare Institute9
- University of London. Animal Welfare Society7
- Spurrier, Robert H.6
- Cather, J. Leonard4
- People's Dispensary for Sick Animals (Great Britain)4
- Universities Federation for Animal Welfare4
- Royal Society for the Protection of Birds3
- Cobbe, Frances Power, 1822-19042
- Humane Education Society (Great Britain)2
- Odette, Mary2
- Patterson, Ewen K.2
- Stevens, Christine2
- Wade, Jessey2
- Williams, Jeffrey D.2
- Yarrow, Mary Craige2
- American Animal Hospital Association1
- American Humane Education Society1
- American Society for the Prevention of Cruelty to Animals1