Although the Act uses the
technical language "wild free-roaming" to describe the horses and burros protected under the Act, the BLM notes that "today's American wild horses should not be considered 'native'." All protected animals descend from domesticated horses and burros brought to the Americas beginning in the 1500s. Some escaped to the wild while others were released, and over the ensuing centuries, these
feral animals adapted to the Western range. Due to the Act, the BLM manages horses and burros as "wild" regardless of their native or non-native status. However, no comprehensive estimate of free-roaming horse numbers was done until 1971, and thus early estimates are speculative. Ranchers shot horses to leave more grazing land for other livestock, other horses were captured off the range for human use, and some were rounded up for
slaughter. By the end of the 1920s, free-roaming horses mostly lived on
United States General Land Office (GLO)-administered lands and
National Forest rangelands in 11
Western States. Their genetic origins were diverse, reflecting the American westward expansion from the mid-1800s on. Their bloodlines included horses of
Spanish-Barb descent as well as draft and saddle horses turned loose on the
open range. Management of horses running on the range was initially left to Mustangers and local ranchers, but in 1934, the
Taylor Grazing Act (TGA) established the
United States Grazing Service (Grazing Service) to manage livestock grazing on public lands. The TGA authorized the Grazing Service to grant ranchers individual grazing allotments and set fees for grazing. The fee to graze a horse was twice that for a cow, and as a result, ranchers allowed unbranded horses to run loose rather than pay for them. The Grazing Service, along with the
Forest Service, was committed to removing the free-roaming horses, which were viewed as
mavericks, from the lands they administered. In 1939, the Grazing Service began to directly hire people to remove horses from public land. The
United States Forest Service periodically gave ranchers notice to round up their strays and thereafter shot any remaining horses. In 1946, the BLM was formed by combining the General Land Office and the Grazing Service. It no longer directly removed horses from the lands it administered, but issued permits to hunters. It is unknown how many free-roaming horses were on the public lands at that time, but removal probably exceeded the animals' reproductive rate, resulting in a decline in numbers. After
World War II, captured horses were often slaughtered to meet the demands of the pet food market. Horses were being chased to exhaustion by airplanes, poisoned at water holes, and removed with other inhumane practices. Between 1950 and 1959, led by
Velma Bronn Johnston—better known as "Wild Horse Annie,"—
animal welfare and horse advocates lobbied for passage of a federal law to prevent the capture of wild horse by inhumane methods. Their efforts were successful. On September 8, 1959, President
Dwight D. Eisenhower signed into law the Hunting Wild Horses and Burros on Public Lands Act, , also known as the "Wild Horse Annie Act", which banned the hunting of feral horses on federal land from aircraft or motorized vehicles. Ownership of free-roaming herds remained contentious, and ranchers continued to use airplanes to gather them. Horses were still subject to individual states'
estray laws, and no law prevented the complete elimination of horse herds. Federal agencies also continued to try to eliminate horses from areas where they were perceived to be causing resource damage. Under BLM policy, ranchers could release a
branded mare into a herd then later round up not only the
mare, but the band the mare ran with, for slaughter or sale. In Nevada, state law permitted ranchers to round up any unbranded horses on their private land and slaughter or sell them. who continued to lobby for federal rather than state control over the disposition of free-roaming horses. In 1962, public pressure lead to the establishment of the Nevada Wild Horse Range, and in 1968, the
Pryor Mountains Wild Horse Range was established. In 1969, the National Mustang Association, headquartered in Utah, persuaded
Senator Frank Moss to introduce a bill (S-2166) to protect the remaining mustangs of Spanish descent under the
Endangered Species Act of 1966. However, since the bill also called for the removal from public lands of all non-Spanish horses, it came under heavy opposition. Federal protection for all free-roaming horses was ultimately accomplished by the passage of the Wild and Free-Roaming Horses and Burros Act of 1971, which specifically states: "A person claiming ownership of a horse or burro on the public lands shall be entitled to recover it only if recovery is permissible under the branding and estray laws of the State in which the animal is found." which alleviated the problem of horses being rounded up under the auspices of belonging to local ranchers. Ranchers were given a specified time period following passage of the Act to claim their horses, and any remaining unbranded and unclaimed herds roaming BLM or Forest Service became the property of the federal government. ==Implementation==