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.
Field artillery in the American Civil War
Horses were required to pull the enormous weight of the cannon and ammunition; on average, each horse pulled about 700 pounds (317.5 kg). Each gun in a battery used two six-horse teams (for normal field artillery; heavier guns required much larger teams): one team pulled a limber that attached to the trail of the gun to form a four-wheeled wagon of sorts; the other pulled a limber that attached to a caisson. The large number of horses posed a logistical challenge for the artillery, because they had to be fed, maintained, and replaced when worn out or injured. Artillery horses were generally selected second from the pool of high quality animals; cavalry mounts were the best horses. The life expectancy of an artillery horse was under eight months. They suffered from disease, exhaustion from long marches—typically 16 miles (25.8 km) in 10 hours—and battle injuries.