Horse
Depending on breed, management and environment, the modern domestic horse has a life expectancy of 25 to 30 years. Uncommonly, a few animals live into their 40s and, occasionally, beyond. The oldest verifiable record was "Old Billy", a 19th-century horse that lived to the age of 62. In modern times, Sugar Puff, who had been listed in "Guinness World Records" as the world's oldest living pony, died in 2007 at age 56.
Miniature horse
The oldest living horse on record was a miniature horse affected by dwarfism named Angel who lived with the Horse Protection Society of North Carolina and lived to be over 50. The current record holder for the world's smallest horse is also a horse affected by dwarfism, Thumbelina, who is fully mature but stands tall and weighs . Though she has received considerable publicity, her owners have publicly stated that she will not be bred. In 2010 a miniature horse foal named Einstein challenged Thumbelina for the title of the World's Smallest Horse in part based upon the idea that there should be a separate world record category for the smallest non-dwarf horse.