Insect farming is growing rapidly as a sustainable protein source. The welfare of farmed insects raises ethical questions that the field is beginning to take seriously.
Insect farming welfare sits at the frontier of what welfare ethics can address. The scientific evidence for insect sentience is genuinely uncertain: insects lack the brain structures associated with conscious pain experience in vertebrates, but show avoidance learning and protective responses to noxious stimuli. The precautionary principle suggests that this uncertainty justifies welfare consideration proportionate to the probability and potential severity of suffering, particularly given the enormous numbers involved. Research into insect welfare indicators and the development of species-appropriate husbandry standards represents the most welfare-responsible response to this genuine uncertainty.