Insect farming is growing rapidly as a sustainable protein source. The welfare of farmed insects — produced in trillions — is an emerging and contested area of animal ethics.
The welfare significance of insect farming depends critically on the unresolved question of insect sentience. If insects can suffer, the welfare implications of producing trillions of animals in confined conditions — and killing them by methods that may not be instantly fatal — are enormous. If they cannot suffer, insect farming may represent a genuinely low-welfare-impact protein source. Current scientific consensus is cautiously agnostic — insects have nociceptors, show protective responses to injury, and alter behaviour after damage, but clear evidence of subjective suffering remains elusive. The precautionary principle suggests investing in research and developing more humane killing methods (such as rapid freezing) given the scale of production.