Dec. 13 is National Day of the Horse.
There is a federal law, the Wild and Free Roaming Horses and Burros Act, that protects wild equines from capture, branding, harassment or death. It was established in 1971.
At the state level, there are several other laws, including anti-cruelty laws, anti-soring laws (a process whereby a horses gait is surgically, and painfully, altered for purposes of presentation at show) and anti-slaughtering laws.