As insect farming grows rapidly, scientists and ethicists are urgently investigating whether insects can suffer and what welfare standards might be appropriate for billions of farmed individuals.
The moral status of insects remains scientifically uncertain, but the precautionary principle suggests taking potential suffering seriously given the enormous scale of insect farming. Insects lack the brain structures associated with conscious pain in mammals, but have nociceptive systems and show avoidance behaviors. The welfare-relevant capacity of different insect species likely varies considerably. Given the billions involved, even small probabilities of sentience justify attention to farming conditions, handling, and slaughter methods.