American bison were reduced from 30-60 million to fewer than 1,000 in one of history's most extreme wildlife near-extinctions, and wild bison today still face significant welfare challenges from brucellosis management and habitat restriction.
Wild bison face the welfare indignity of being shot when they follow their natural migration instincts across political boundaries that have no ecological meaning. Bison that move from Yellowstone to Montana in winter following ancestral migration routes are killed not for posing a proven disease risk to cattle but to satisfy livestock industry political demands. Brucellosis management through vaccination and culling imposes both direct welfare costs (shooting) and population-level reproductive disruption. Individual bison dying from harsh winters experience starvation and cold - natural welfare challenges. The management-driven shooting of healthy animals crossing invisible lines represents preventable suffering imposed by human political decisions rather than ecological necessity.