11-The Friesian:
The Friesian has long been lauded not just for its stunning black coat and flowing mane, but also for its incredible health. This regal breed has an impressive lifespan, with some Friesians living well into their twenties and even thirties. Part of their longevity can be attributed to their strong immune system and sound structural health. Additionally, Friesians are known for their balanced temperament, making them easy to train and handle which can lead to less stress and likelihood of illness. For those looking for a horse breed that embodies both beauty and good health, the Friesian is a fantastic option.