GUADALAJARA, Mexico, Oct. 19–The United States became the first nation to sweep the three individual dressage medals at the Pan American Games Wednesday, after an unprecedented fourth straight team gold medal in a feat rarely achieved at major championships…

The Internaional Equestrian Federation’s Dressage Committee has sent to the 133 national federations a controversial proposal to allow elimination of a horse displaying blood in a championship to undergo a veterinary examination and, if found not to be harmful to…