Welfare Science

Farmed Insect Welfare Standards and BSFL

Black soldier fly larvae (BSFL) are increasingly farmed for protein, but their welfare capacity and appropriate standards remain a subject of active scientific debate.

Key Facts

BSFL are farmed for feed protein, estimated to kill billions of animals annually
Insect sentience evidence is debated; they have nociceptors but lack key brain structures for pain processing
The Rethink Priorities Moral Weight project assigns low but non-zero probability of insect sentience
BSFL welfare recommendations focus on temperature, density, food quality and humane slaughter
Regulatory frameworks for insect welfare are emerging in the EU and UK

Welfare Considerations

Insect welfare is an emerging and uncertain field. Given the scale of production, even a small probability of sentience warrants precautionary welfare standards.

What You Can Do

Support research into insect sentience and welfare indicators
Choose insect protein products from producers with documented welfare standards
Advocate for precautionary welfare requirements in insect farming regulations