As insect farming scales for protein production, welfare science for black soldier flies and mealworms is emerging, addressing stocking density, substrate quality, and humane end-of-life practices.
Insect welfare is among the most philosophically contested areas of animal welfare science. The question of whether insects have subjective experiences, and thus a welfare in the morally relevant sense, remains unresolved. However, the precautionary principle increasingly argues for treating insect welfare as a live concern, particularly given the enormous scale of insect farming. Research suggests that thermal stress, overcrowding, and inappropriate substrate cause measurable physiological responses in some insect species. End-of-life practices are an area of particular focus, with some researchers arguing for rapid thermal killing methods over prolonged cold exposure. The development of insect-specific welfare standards represents an important frontier for a rapidly growing industry.