As insect farming expands globally for protein production, scientific and ethical questions about insect sentience and welfare deserve serious examination.
Insect welfare occupies a distinctive space in animal ethics: the probability of sentience is low by current scientific understanding but not zero, and the scale of production means even a small probability of morally significant experience multiplied by trillions of individuals deserves serious ethical consideration. This is precisely the reasoning framework that justifies precautionary welfare consideration for fish and invertebrates. If insects experience even mild versions of pain, farming billions under conditions of extreme crowding would represent an enormous welfare cost. Research into insect sentience is growing but methodologically challenging given the radical divergence of insect nervous systems from vertebrate models. The prudent approach for both ethics and public trust involves pursuing welfare-positive practices proportionate to credible sentience probability — particularly for killing methods and stocking density — while acknowledging the scientific uncertainty involved.