Silkworms (Bombyx mori) are farmed in the billions annually for silk production. As evidence grows that insects may have some capacity for pain or aversive experience, the welfare of silkworms during the killing process — typically boiling alive while inside the cocoon — has attracted increasing ethical scrutiny.
The welfare status of silkworms is genuinely uncertain, and intellectual honesty requires acknowledging both the possibility of suffering and the limits of current knowledge. The precautionary principle — taking potential welfare seriously under uncertainty — suggests that where feasible alternatives exist, they should be considered. The scale of silkworm killing is enormous: if there is even a small probability of suffering, the aggregate is significant. However, the economic and livelihood importance of silk farming, particularly in developing countries, means that welfare improvements must be carefully balanced with social equity. Research into rapid, low-suffering killing methods (such as high-CO2 exposure or electric stunning) is a practical near-term priority. Consumer awareness can support market demand for higher-welfare silk options.