Organizations' Against Private Ownership
- Animal Rights Agenda
- Animal Protection Institute (API)
- Captive Wildlife Animal Protection Coalition
- Humane Society of the United States
- Humane USA
- People for the Ethical Treatment of Animals
- ASPCA
- Animal League Defense Fund
- Animal Liberation Front
- Animal Rights Foundation of Florida
- Animal Welfare Institute
- PAW PAC
- Doris Day Animal League
- Farm Sanctuary
- Friends of Animals
- Fund for Animals
- In Defense of Animals
