Wild animals experience enormous suffering from parasites, infectious disease, and injury that occurs without human intervention or relief.
The welfare of wild animals living natural lives includes not only human-caused harm but the vast suffering inherent in nature itself — from parasites consuming living tissue to starvation during harsh winters to the terror of predation. This reality challenges simplistic assumptions that wild equals good. It also raises genuinely difficult ethical questions about human intervention: when and whether to treat wild animals for diseases or parasites, and what scale of intervention is feasible and wise.