American bison were reduced from tens of millions to fewer than a thousand by the late 19th century through market hunting, and restoration efforts have recovered populations while revealing the complex welfare needs of a highly social grazing species.
Bison restoration raises important welfare questions about what truly wild bison welfare requires compared to the managed herd conditions in which most conservation bison live. Wild-type bison welfare centered on mobility, complex social dynamics, behavioral freedom, and ecological function requires space at a scale that only a handful of conservation projects can provide. Most conservation bison live in managed herds where behavioral expression is better than in livestock production but still constrained relative to the vast prairie ranges their ecology evolved for. Genuine prairie restoration projects that allow bison to range freely across large intact grasslands and regulate their own population dynamics through predator interactions provide the conditions closest to wild bison welfare. Supporting these large-scale restoration efforts is among the most meaningful welfare investments available for this iconic species.