Animal cognition research has repeatedly revealed sophisticated mental capabilities in species once thought to be simple. These findings have direct implications for how we evaluate the welfare status of different species.
Cognitive complexity is increasingly recognized as a morally relevant consideration in welfare assessment. Species that can plan, remember, anticipate, and form social bonds likely have richer welfare experiences than cognitively simpler animals. Research revealing unexpected cognitive abilities in fish, invertebrates, and birds consistently expands the circle of moral concern. These findings should drive regulatory and industry responses to the welfare of newly recognized cognitively complex animals.