As insect farming grows, understanding how substrate quality and density affect insect welfare is important for both ethical and production reasons.
Insect farming at industrial scale raises welfare questions that are difficult to answer definitively given uncertainty about insect sentience. However, the precautionary principle argues for providing conditions that minimize potential suffering. Overcrowded, overheated, or nutrient-depleted substrates cause measurable harm to larval development and survival rates. Welfare-conscious substrate management — appropriate moisture, temperature within species-optimal ranges, and adequate food substrate — improves both welfare proxies and production outcomes. As the industry grows, developing welfare indicators for farmed insects is an ethical and practical priority.