What was Paladin's horse's name?

The oldest living horse on record was Old Billy, he was foaled in 1760 and passed away in 1822 at the age of 62.
The second oldest horse on record was Shayne, a liver chestnut crossbred foaled in 1962 and passed away in 2013 at age 51.

The oldest living pony was Sugar Puff, who was foaled in 1951 and passed away in 2007 at age 56.