Senses Horses have the largest eyes of any land animal except for the ostrich. A horses eyes can move independently of each other in a half circle. Thus a horse can look forward with one eye and backward with the other. Horse's eyes take a fairly long time to adjust to changes in amounts of light. This can make them nervous until their eyes adjust.
Horses have very good hearing.
The ears can pivot to focus on individual sounds. The ears can also show the mood or attitude of a horse. When the ears are perked, a horse may be curious. If the ears twitch or are laid back, the horse may be angry. A horse has a well developed sense of smell.