Legal recognition of animal sentience - the capacity to have subjective experiences - is transforming animal protection frameworks globally, with significant implications for how law protects animal interests.
Legal sentience recognition matters because it changes the framework for how animal interests are weighed against human interests. Under property law, animals are objects with no standing; under sentience-based frameworks, their capacity to suffer becomes legally relevant to decision-making. But recognition alone does not guarantee protection - implementation, enforcement and cultural change determine actual welfare outcomes. The most significant welfare gains come when sentience recognition is linked to mandatory consideration in policy decisions, not merely symbolic acknowledgment. Expanding sentience protection to invertebrates reflects the growing scientific evidence on their capacity for negative states.