American bison were reduced from 30-60 million animals to fewer than 1,000 by 1900; restoration on tribal and conservation lands is rebuilding both ecosystems and the welfare of wild herds.
The welfare difference between wild-ranging and commercially-managed bison is substantial. Commercial bison raised for meat may be managed similarly to cattle, with branding, dehorning, and feedlot finishing that cause pain and restrict natural behaviour. Truly wild bison herds maintain complex matrilineal social bonds, engage in seasonal migrations, and raise calves in natural family groups. Bison in fragmented reserves may experience genetic bottlenecks and reduced behavioural expression due to limited range. Roundup operations on managed herds cause acute stress. However, restoration of bison to large native grasslands — particularly under tribal stewardship that emphasizes cultural and ecological values over maximum production — offers a model of animal management where welfare is aligned with ecological and cultural goals.