Country singer/songwriter Toby Keith passed away Monday following a battle with stomach cancer, his family announced Tuesday. While best known for his music career, which included 20 No. 1 hits, he also owned and bred Thoroughbreds and was known for his passion of the sport. Keith raced and bred primarily under the name of Dream Walkin Farms, which started its first horse in 2001. Dream Walkin was a song on an album by the same name that Keith released in 1997. According to Equibase, Dream Walkin won 848 races and...