North American bison face welfare issues at the intersection of conservation and ranching, including culling, roundups, and genetic management.
Annual roundups involve helicopters, ATVs, and stress-inducing handling. Hazing of Yellowstone bison migrating outside park boundaries involves repeated frightening and killing. Culling of individuals from managed herds involves shooting, which causes suffering if not conducted humanely. Commercial bison operations often confine animals to areas too small for their ranging behavior.