Insect Farming Welfare: Navigating Uncertainty About Sentience at Scale

Insect farming is rapidly expanding as a sustainable protein source, but significant uncertainty about insect sentience and pain capacity creates important welfare considerations for billions of animals.

Key Facts

Global insect production for food and feed is projected to reach several million tonnes annually by 2030, involving tens of billions of individuals.
The question of whether insects experience pain or suffering is genuinely scientifically uncertain — evidence exists on both sides.
Insects possess nociceptors and demonstrate avoidance learning, but lack the centralised nervous system structures associated with conscious pain in vertebrates.
The Cambridge Declaration on Consciousness (2012) did not include insects; however, some leading researchers advocate precautionary welfare consideration.
Black soldier fly larvae, mealworms, and crickets are the primary farmed species, each with different stress response profiles.
Insects are typically killed by freezing, boiling, or grinding — methods whose humaneness is contested given uncertainty about their sentience.
Welfare standards for insect farming are nascent; the UK's 2022 Insect Industry Welfare Code was among the first national frameworks.

Welfare Considerations

The welfare challenge with insect farming is fundamentally one of uncertainty. If insects do not experience pain or suffering, their farming at industrial scale raises no welfare concerns beyond ecological impacts. If they do have some capacity for negative experience — even if very different in kind from vertebrate suffering — then the sheer scale of insect production makes it potentially one of the largest sources of welfare-relevant suffering in the food system. The precautionary principle argues for taking insect welfare seriously now: developing and implementing low-cost welfare improvements (appropriate temperature, humidity, substrate, and killing methods) costs little if insects are not sentient, but could matter enormously if they are. This is an area where welfare science urgently needs to advance.

What You Can Do

Support research funding for insect sentience science to reduce uncertainty about their welfare needs.
When consuming insect products, prefer producers demonstrating awareness of and commitment to welfare standards.
Advocate for insect welfare to be included in national animal welfare legislation on a precautionary basis.
Follow the Invertebrate Welfare Cause for updates on emerging evidence about insect and invertebrate sentience.
Engage with the insect farming industry on developing voluntary welfare standards while regulatory frameworks develop.