Animals as Property: The Legal Foundation
In virtually every legal system worldwide, animals are classified as property — things that can be owned, used, and disposed of by their owners. This classification has profound consequences: animals cannot hold legal rights, cannot sue for their own protection, and can only receive legal protection through laws that humans choose to enact on their behalf.
This stands in tension with the scientific consensus that many animals are sentient beings capable of suffering. The Cambridge Declaration on Consciousness (2012) — signed by a prominent group of neuroscientists — stated that "non-human animals possess the neurological substrates that generate consciousness." Yet the law has been slow to reflect this reality.
The Property Paradox
The legal classification of animals as property creates an inherent conflict: the same entity whose suffering is legally irrelevant is simultaneously recognized by animal welfare laws as capable of suffering. Most animal welfare statutes essentially say: "This property has legally cognizable interests in not suffering — but remains property." Legal scholars debate whether this contradiction can be resolved without reclassifying animals as legal persons.
Categories of Animal Law
🛡️ Animal Welfare Laws
Anti-cruelty statutes and animal welfare acts prohibit the infliction of unnecessary suffering. Key examples: US Animal Welfare Act (1966), UK Animal Welfare Act (2006), Germany's Animal Welfare Act, EU Animal Welfare Directives. These laws set minimum standards but typically exempt agricultural, research, and other institutionalized uses.
🌍 Endangered Species Law
Laws protecting species from extinction, including the US Endangered Species Act (1973), CITES (international wildlife trade treaty), and national biodiversity laws. These laws protect species-level interests but do not necessarily protect individual animals within those species.
🐾 Companion Animal Law
Laws governing pet ownership, licensing, leash laws, dangerous dog legislation, and increasingly, pet custody disputes in divorce proceedings. Some jurisdictions now consider the "best interests of the animal" in custody disputes rather than treating pets as property divided by value.
🔬 Animal Research Law
Regulations governing the use of animals in scientific research — the 3Rs framework (Replace, Reduce, Refine), institutional animal care and use committees (IACUCs), licensing requirements. The EU Directive 2010/63/EU is the most comprehensive research animal protection law globally.
🐄 Agricultural Animal Law
A patchwork of laws governing farmed animals — often the weakest area of animal protection. The US has almost no federal farm animal welfare law (the Animal Welfare Act explicitly excludes farm animals). The EU has more developed protections but with significant exemptions for religious slaughter and traditional practices.
⚖️ Animal Standing & Personhood
The emerging frontier of animal law — efforts to grant animals legal standing to sue through representatives, or full legal personhood. Courts have so far rejected these efforts, but the legal arguments and public debate are growing in sophistication and influence.
Landmark Cases and Legal Developments
Martin's Act (UK) — The first modern animal welfare law, prohibiting "cruel and improper treatment" of cattle, horses, and sheep. A landmark in establishing that animal suffering was a matter of public legal concern.
US Animal Welfare Act — Federal law regulating treatment of animals in research, exhibition, transport, and dealer operations. Notoriously excludes farm animals, birds, rats, and mice (the most used research animals).
Germany becomes the first EU country to enshrine animal protection in its constitution ("The state takes responsibility for protecting the natural foundations of life and animals within the framework of the constitutional order").
Spain's Great Ape Project — Spain's parliament passed a resolution extending legal protections to great apes, banning their use in research, circuses, and entertainment — the closest any government has come to legal personhood for non-human primates.
Nonhuman Rights Project v. Lavery — The NhRP filed the first of several habeas corpus petitions on behalf of chimpanzees in the US. While unsuccessful, the cases sparked major legal and philosophical debate. Justice Eugene Fahey's 2018 concurrence called the issue "profound" and urgently in need of resolution.
Argentina: Sandra the Orangutan — A Buenos Aires court recognized Sandra as a "non-human person" subject to legal rights and ordered her transfer from a zoo to a sanctuary — a first for a great ape globally.
Colombia: Bear "Chucho" — Colombia's Supreme Court initially granted a spectacled bear habeas corpus rights (later reversed), but the decision demonstrated growing judicial willingness to engage with animal personhood arguments.
UK Animal Welfare (Sentience) Act — Legally recognizes all vertebrates and certain invertebrates (including octopuses, crabs, and lobsters) as sentient beings capable of experiencing positive and negative emotional states. Creates an Animal Sentience Committee to advise government.
New York Declaration on Animal Consciousness — Over 40 prominent scientists signed a declaration affirming that many non-human animals — including insects — "have the neurological capacity for conscious experience." Significant for informing legal developments.
The Legal Personhood Debate
The Nonhuman Rights Project (NhRP), founded by attorney Steven Wise, argues that certain cognitively complex animals — particularly great apes, elephants, and cetaceans — should be recognized as "legal persons" with the right to seek habeas corpus relief against unlawful detention.
Arguments for legal personhood:
- Legal personhood is not the same as citizenship or human rights — it simply means the ability to hold some legal rights and interests
- Corporations already have legal personhood without being sentient
- The cognitive complexity of great apes, dolphins, and elephants (complex social bonds, self-awareness, forward planning) justifies some legal protection of autonomy
- The property classification currently makes it impossible for animals to legally vindicate even their most basic interests
Arguments against:
- Legal personhood would create unworkable practical consequences
- Drawing the line between "persons" and "non-persons" among animals is arbitrary
- Better to strengthen welfare laws within the existing framework
- Courts are not the right place to make this determination — it should be legislated
The Whanganui River Model
New Zealand granted legal personhood to the Whanganui River in 2017 — not because the river is sentient, but to give it legal standing to be represented in court. Some legal scholars argue a similar approach could work for animals: grant legal standing without resolving the philosophical question of full personhood.
Agricultural Exemptions: The Biggest Gap
The most consequential area of animal law is what is excluded. In the United States:
- The Animal Welfare Act explicitly excludes farm animals
- The Humane Methods of Slaughter Act excludes chickens and turkeys (the vast majority of animals slaughtered)
- 28 states have "ag-gag" laws criminalizing undercover investigations of farming operations
- Most state anti-cruelty statutes have explicit exemptions for "standard agricultural practices" — allowing practices that would be criminal if done to pets
The EU has more developed protections, but significant exemptions remain for religious slaughter, research, and traditional farming practices. The 2023 EU Farm Animal Welfare Law revision process offers hope for improved standards.
Animal Law Education and Advocacy
Animal law has grown dramatically as a legal discipline:
- Over 200 US law schools now offer animal law courses (up from 9 in 2000)
- The Animal Legal Defense Fund (ALDF) litigates animal protection cases and ranks state animal cruelty laws annually
- The Nonhuman Rights Project (NhRP) pursues legal personhood cases for cognitively complex animals
- Animal Equality and Humane Society Legislative Fund lobby for legislative reforms
- The Global Animal Law (GAL) Association works toward consistent international animal law frameworks
What You Can Do
🗳️ Support Ballot Initiatives
Many significant animal welfare gains have come through ballot initiatives — Proposition 12 in California (2018), Proposition 2 in Massachusetts (2016). Support and vote for animal protection measures on your ballot.
📧 Contact Legislators
Contact your state and federal representatives to support stronger animal welfare legislation, oppose ag-gag laws, and support farm animal welfare reforms.
💰 Support Animal Law Organizations
Animal Legal Defense Fund and Nonhuman Rights Project work at the legal frontier for animals. Donations fund impact litigation and policy work.
⚖️ Consider Animal Law Career
If you are in or considering law school, animal law is a growing field that urgently needs talented advocates. The ALDF offers internships, fellowships, and career resources.
Law Reflects Society's Values
The evolution of animal law tracks the evolution of moral understanding. As scientific evidence of animal sentience accumulates and public awareness grows, the law will change. Advocacy, litigation, legislation, and education all play roles in accelerating that change.
Take Action Sentience Policy