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.
Hequ horse
Mares mature at two years old and are able to reproduce at three. They can give birth to 12 or 13 foals in their lives. The fertility rate is 70%, but can go up to 80 or even 90% with appropriate care.