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.
Tibetan Terrier
A UK Kennel Club survey puts the average lifespan of the breed at 12 years. About one in five lives to 15 years or more, with the longest-lived Tibetan Terrier having lived to 18.25 years. 
Though an athletic breed that has been bred for a natural look, the Tibetan Terrier is nonetheless susceptible to a variety of health problems, especially those related to the eyes and joints. These problems can include canine hip dysplasia, luxating patella, progressive retinal atrophy, lens luxation, cataracts and heart murmurs. Tibetans also have a history of being somewhat allergic to dairy, wheat and grains. Because of these potential health conditions Tibetan Terrier clubs recommend purchasing from breeders who participate in eye and hip testing, such as the Canine Eye Registration Foundation (CERF) and Orthopedic Foundation for Animals (OFA).