Insect farming is growing rapidly as a sustainable protein source. The welfare status of farmed insects is genuinely uncertain but deserves serious consideration given the enormous scale of production.
Insect welfare presents a genuinely difficult moral uncertainty problem. Current scientific evidence suggests insects have much lower probability of conscious pain experience than vertebrates, but certainty is impossible given the hard problem of consciousness. The moral stakes of this uncertainty are amplified by scale: billions of insects farmed under intense conditions means that even a small probability of sentience translates to enormous potential suffering at aggregate level. A precautionary welfare approach does not require treating insects as equivalent to vertebrates, but does justify preferring less aversive killing methods when cost differences are small, supporting research into insect sentience, and maintaining awareness that the field is evolving rapidly. The insect welfare question is one of the most important unresolved issues in applied ethics.