The welfare of wild animals includes exposure to predation, parasitism, starvation, injury, and disease that cause substantial suffering at scale, raising difficult philosophical questions about the scope of welfare concern.
Wild animal welfare raises the deepest questions in the field: if we take animal suffering seriously, the scale of natural suffering in wild populations dwarfs what occurs in human-controlled systems. This is not an argument against addressing human-caused harm, but it does expand the moral landscape beyond farms and laboratories to the entirety of the living world. The field of wild animal welfare is young and interventionist approaches remain controversial, but the intellectual honesty that wild animals suffer regardless of human involvement seems increasingly hard to avoid. Habitat conservation, disease management, and reducing additional human stressors on already-challenged populations represent the most defensible current interventions.