Silk production involves the killing of billions of silkworm pupae annually. While silkworm sentience is uncertain, the scale of use and growing invertebrate welfare science make this an increasingly discussed welfare topic.
Silkworm welfare sits at the edge of invertebrate sentience uncertainty. Unlike crustaceans and cephalopods, silkworms have received little specific welfare research, and their relatively simple nervous systems make confident sentience claims difficult. Yet precautionary reasoning applies at scale: 15 billion animals killed annually warrants at least curiosity about whether suffering occurs. The boiling process used in conventional silk production would, if silkworms are capable of pain, represent one of the largest sources of invertebrate suffering in any commercial system. Ahimsa silk offers a partial response but cannot scale to replace conventional production without major land use implications. Fermentation-derived silk proteins and other alternatives offer a long-term path away from silkworm killing that sidesteps the sentience uncertainty entirely.