Spirit: Stallion of the Cimarron (2002)

In the 19th-century American West, an eagle is seen flying through many western locations. As the proper story begins, a young Kiger Mustang colt, Spirit, is born to a herd of horses. Spirit soon grows into a Stallion (horse) and assumes the role of leader of the herd, whose duty is to keep the herd safe. Spirit is a courageous leader but has great curiosity. One night, upon spotting a strange light near his herd, the stallion decides to investigate the location, where he finds restrained, docile horses and their human wrangler (profession) sleeping around a campfire. They wake up, and seeing him as a magnificent specimen, chase and capture him, taking him to a US cavalry post.