The horse has evolved over the past 45 to 55 million years from a small multi-toed creature into the large, single-toed animal of today. Humans began to domesticate horses around 4000 BC, and their domestication is believed to have been widespread by 3000 BC.
Horses within the whole subspecies Caballus are domesticated, even a few domesticated populations reside in the wild as feral horses. these feral populations are definitely not true wild horses, as this term is designed to describe horses which have never been domesticated, such clearly as the endangered Przewalskis horse, a separate subspecies, and the ultimate remaining true wild horse.
There's an extensive, specialized vocabulary used to describe equine-related concepts, covering everything from anatomy to life stages, size, colors, markings, breeds, locomotion, and behavior.
Below few Horse picture that you may like
Horse picture - exnim.com