Impalas are among the most abundant African ungulates and central to savanna food webs. Their welfare under predation pressure provides insights into wild animal experience.
Impalas in high-predator-density areas experience chronic low-level vigilance stress from constant predation risk — the cost of living in prey position in an intact ecosystem. Individual animals killed by predators experience acute fear during the chase and pain during capture and consumption. However, this suffering occurs within an ecological context where predation maintains population health by removing sick and weak individuals. The philosophical question of whether predation suffering in intact ecosystems should be prevented or mitigated — wild animal suffering intervention — is an active debate in animal ethics. Most welfare advocates focus on preventing human-caused suffering before addressing natural suffering in wild populations.