Cody Dorman died after suffering a “medical event" on the family’s way home to Kentucky after attending the world championships at Santa Anita last week.
One Last Wish for a Boy and His Horse bloodhorse.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from bloodhorse.com Daily Mail and Mail on Sunday newspapers.
Dorman was born with the rare genetic disorder Wolf-Hirschhorn syndrome, and the effects include delayed growth and development, intellectual disability, low muscle tone, and seizures. He used a wheelchair.