In the United States wild horses are supposedly protected under law. The laws that apply to management and protection standards are determined by the land they occupy.
There are several agencies and jurisdictions that manage horse populations. There are state and Federal agencies that manage shrinking populations of wild horses and burros. Most people are familiar with the Bureau of Land Management (BLM) as they manage more public land than any other agency, therefore more wild horses. Yet the United States Forest Service (USFS) also manages horses and was supposedly held by the standards of law that bind the BLM. It was the expectation that these agencies would manage in a cooperative manner. *