Research into invertebrate pain and sentience has advanced rapidly, challenging traditional assumptions and reshaping how regulators and producers approach welfare for billions of animals.
The invertebrate pain research field has moved from niche academic curiosity to policy-relevant science in under a decade. The key advance has been separating nociception (sensory detection of harm) from pain as a subjective experience, while recognising that behavioural and physiological evidence for the latter is accumulating across many invertebrate taxa. The practical welfare implications are enormous: insect farming alone involves vastly more individual animals than all vertebrate farming combined. Applying the precautionary principle - reducing suffering where it may exist even amid scientific uncertainty - is the position now endorsed by multiple national and international bodies.