After a horse reportedly named after a racist slur won the first race at Aqueduct Jan. 8, reaction on social media and throughout the industry was swift to denounce the name and trainer Eric Guillot, who had posted a picture of the horse and its name days earlier on social media. The 3-year-old gelding by Uncle Mo, who won his debut Friday, was named Grape Soda, a racist stereoptype directed at African Americans. A Tweet on January 1 on Eric Guillot's Twitter feed indicated that he had been named after...