Frontera Sugar has a small bit of controversy attached to her breeding. Her breeder later registered Frontera Sugar's dam as Palomino D O, but the AQHA has never gotten this correction into their records. Palomino D O was registered in 1947 with number 8353. Her breeding was given as by a son of Ben Hur, and out of a Reynolds Brothers mare. This is not the Reynolds that bred Frontera Sugar, but rather the Reynolds Brothers that owned the X Ranch in Kent, Texas.