The “Mustang” term comes from the Spanish word mesteño or monstenco meaning wild or stray. The Mustang originated from the Spanish Horses, which we now refer to as Andalusians. The Spanish conquistadors introduced these horses when they landed on the American continent. Once the Spanish became established after the destruction of the Aztecs some of the Spanish horses had gotten loose or were let go and became wild or feral. Over the years these wild horses became a mix of numerous breeds. The Mustang is a feral horse found now in the western United States. Around the early twentieth century millions of wild Mustangs wandered the western states. After the western United States became settled and cattle and other grazing animals were added to the range the lands could not support such large wild herds of horses. During this time on some ranches it became policy to shoot Mustangs. These horses were used to supply pet food and meat for human consumption. The estimated population by 1926 was decreased by half. Today law now protects the Mustang and the estimated population is around 30,000. The herd is maintained by agencies and excess animals are adopted out to the public to control herd sizes.