Insect farming for protein is rapidly growing, raising welfare questions about the sentience and pain capacity of insects that must be addressed as the industry scales to billions of animals annually.
Insect welfare sits at a genuine scientific frontier. The question of whether insects can suffer in morally relevant ways is unresolved, with evidence pointing in both directions. Insects show behavioral responses to noxious stimuli that parallel pain responses, have opioid-like systems, and can learn to avoid harmful conditions — all suggestive of some capacity for aversive experience. However, their neural architecture differs fundamentally from mammals, and the degree to which their responses involve subjective suffering is uncertain. Given the scale of insect farming — trillions of individuals — even a small probability of morally relevant suffering translates to enormous potential aggregate harm. A precautionary approach suggests minimizing unnecessary stress in insect farming and developing and adopting more humane killing methods while science continues to clarify the welfare question.