- World Society for the Protection of Animals (WSPA)
- International Fund for Animal Welfare (IFAW)
- American Humane Association
- Best Friends Animal Society
- RSPCA (UK)
- In Defense of Animals
- American Veterinary Medical Association
- American Veterinary Medical Foundation
- Antigua and Barbuda Human Society
- ASPCA
- United Animal Nations
- Kinship Circle
- One Voice
- Swiss Animal Protection
- Palo Alto Humane Society (PAHS)
- People for the Ethical Treatment of Animals (PETA)
- Finnish Federation for Animal Welfare Associations
- Animal Medical Care Foundation (AMCF)
- Petfinder Foundation
- Mayhew International
- Last Chance for Animals (LCA)
