Final answer:
The Horse Protection Act protects horses against the practice of soring, which is the deliberate infliction of pain to produce an exaggerated gait in show horses.
Step-by-step explanation:
The Horse Protection Act is a law in the United States that protects horses against the practice of soring. Soring is the deliberate infliction of pain on horses' legs or hooves to produce an exaggerated gait in show horses. This act prohibits the showing, exhibiting, transporting, or selling of horses that have been subjected to soring.