Insect Welfare in Mass Rearing Systems

The growing insect farming industry raises emerging welfare questions about billions of invertebrates reared for food, feed, and pharmaceutical applications.

Key Facts

Global insect production for animal feed and human food has grown exponentially, with over 50 commercially farmed species
Black soldier fly, mealworm, and house cricket are the most commonly farmed insect species at commercial scale
Scientific evidence on insect sentience remains contested, but behavioral evidence of nociception and avoidance learning suggests minimal capacity for pain
The precautionary principle increasingly guides welfare guidance for insect farming, given the billions of individuals and uncertainty about their capacities
Rearing conditions including temperature, humidity, crowding, and substrate quality can affect insect health and survival rates
The FAO and several European regulatory bodies have begun developing welfare guidelines for farmed insects

Welfare Considerations

Insect welfare is one of the most morally uncertain frontiers in animal welfare. The sheer scale of insect farming — involving trillions of individuals — means that even small probabilities of morally relevant experience could translate into enormous welfare significance. A precautionary, evidence-responsive approach that minimizes unnecessary suffering while research develops is the most defensible position given current knowledge.

What You Can Do

Support research into insect sentience and welfare to reduce moral uncertainty in this domain
Advocate for regulatory frameworks that apply the precautionary principle to insect farming standards
Choose insect products from producers who have considered and addressed welfare in their rearing practices
Follow emerging guidance from organizations such as the FAO and Insect Welfare Research Society