American bison have been restored from near-extinction to several hundred thousand animals, but most live in fenced reserves. Behavioral welfare depends on sufficient space and natural herd dynamics.
Bison welfare in restoration contexts varies dramatically between commercial ranching and conservation management. Commercial bison herds managed for meat production may face handling and crowding stress similar to cattle, particularly during roundups and processing. Conservation bison herds managed for behavioral integrity provide conditions for natural social and movement behavior, including large rut gatherings and seasonal migrations. Bison in Yellowstone demonstrate how access to sufficient space restores full behavioral complexity including natural predator-prey dynamics. The bottleneck population that survived in the 19th century has reduced genetic diversity, creating health vulnerabilities in modern bison. Conservation genetics programs work to maximize diversity within the recovered population.