Advances in animal cognition research continue to reveal sophisticated mental capacities in species previously assumed to have simple psychology, with direct welfare implications.
Cognitive research welfare implications are profound: each new finding of sophisticated mental capacity in previously dismissed taxa expands the circle of animals whose welfare deserves serious consideration. Octopus farming welfare concerns are inseparable from octopus cognition research. Fish welfare science advances because of revised understanding of fish intelligence and nociception. Corvid welfare in agriculture and pest control must consider their planning capacity and social intelligence. The pattern of research consistently finding greater cognitive sophistication than expected should create ongoing precautionary expansion of welfare consideration rather than waiting for certainty. The default assumption should be welfare relevance until evidence for the contrary, not dismissal until evidence for sophistication.