Insect farming for food and animal feed is growing rapidly. The scale of production — trillions of animals — means even small welfare improvements could have enormous aggregate impact.
The welfare implications of insect farming depend critically on the probability that insects experience something. This remains genuinely uncertain — evidence for nociception in some insect species is reasonable, but evidence for conscious experience is much weaker. The appropriate response to this uncertainty is a precautionary one, weighted by scale. At trillions of individuals, even a small probability of sentience across the insect farming industry represents potentially enormous aggregate impact. Welfare researchers argue that this calculation justifies investing in faster, less potentially painful killing methods, optimizing rearing conditions to avoid chronic stressors, and developing research programs to better characterize insect sentience. The alternative — treating insects as definitively non-sentient because certainty is absent — fails the precautionary welfare test.