Insect farming is expanding rapidly as a sustainable protein source, but the welfare implications of farming billions of insects are only beginning to be addressed by science and policy.
Insect farming welfare represents a genuinely novel challenge for animal welfare science. The question of insect sentience — whether insects have subjective experiences of pain, fear, or suffering — remains scientifically unresolved. Key indicators such as nociception (pain signaling), learning, protective behavior, and physiological stress responses are documented in some insect species but do not resolve the deeper question of subjective experience. The precautionary principle suggests that given uncertainty, welfare-improving practices should be adopted. Killing methods vary considerably in their humaneness by available evidence: rapid freezing and high-temperature methods likely cause less suffering than slow asphyxiation. Stocking densities in insect farming have received almost no welfare scrutiny. The relative scale matters enormously — if insects merit even small moral consideration, the trillions farmed annually represent a huge welfare impact. Regulatory frameworks for insect welfare are beginning to develop in the EU and UK.