Invertebrates

Insect Mass Rearing and Welfare Considerations

The rapid growth of insect farming for food and feed raises under-examined questions about the welfare of billions of insects in industrial systems.

Key Facts

Global insect protein production capacity is growing at 25% annually
Black soldier fly larvae and mealworms are the most commercially farmed insects
Stocking densities in industrial insect farms far exceed natural conditions
Killing methods include freezing, boiling, shredding, or CO2 exposure
Evidence for insect sentience remains contested but is growing

Welfare Considerations

If insects can experience negative states — even in limited ways — the scale of insect farming makes this a welfare issue of enormous potential magnitude. Billions of insects are processed daily with methods whose impact on any sentient experience is unknown. The precautionary principle suggests investing in research and more humane killing methods even before certainty about insect sentience is established.

What You Can Do

Support research into insect sentience and welfare-relevant neuroscience
Advocate for welfare standards that apply proportionally to evidence of sentience
Ask insect protein companies about their welfare commitments and killing methods
Follow insect welfare research organizations such as Rethink Priorities