Horses often have to learn to use binocular vision through training. Examples are when teaching a rope horse to follow cattle at the correct distance, teaching a barrel horse to judge the distance to a barrel in order to make a turn, or teaching a hunter or jumper the correct approach to a fence. There is not much known about the horse's sense of smell. However, it is generally agreed that it is somewhat well- developed. Horses have apparently learned to associate certain odors with specific conditions considered to be friendly or life threatening.
Horses use smell to locate feed and to identify each other as well as humans.
They are frequently able to associate a medicinal smell with veterinarians and their function. When certain odors are associated with unpleasant or threatening conditions, horses may become nervous and difficult to control. Hearing Horses have a well-developed sense of hearing. In most situations sounds that are audible to people are also heard by horses. However, some differences do exist.