Understanding how horses perceive their world and respond to it helps the horseman/woman better understand how to respond to a horse’s actions and train the horse in a more synergistic way.

Having eyes on the side of the head enable a horse to see predators that may approach from the sides. Because they are prey animals they are very aware of movement in their field of vision. Most riders/handlers have experienced this when a horse has a violent reaction to something like a piece of paper blowing in the wind. This can then trigger the fight or flight response-a spook and stand or a spook and run.
Understanding the range they can see is important when working around or riding a horse so you can understand when they can and can’t see you or the ground you expect them to travel on. The following are examples of the range of vision in resting or working horses:

Binocular means the horse has the use of both eyes in that area. Monocular vision means that the horse can only see with one eye in that area. This reduces the ability to judge depth and distance.
Have you ever ridden a spooky horse? He thinks there is a monster in every corner of the arena, he hesitantly trots towards it, slowing with every stride, looking intently. As he passes by and his vision becomes monocular to the object or area of his fear he can no longer hold himself together and he spooks. He does this at that point because he can no longer judge the depth as well, he feels much more vulnerable when he looses the binocular vision on that object or area. (More below in the ‘Hearing’ section on how to help the spooky horse).


This horse in being ridden with his head behind the perpendicular line so he can barely see in front of himself.

A jumper often lifts his head higher on the approach to a fence, particularly the larger jumps, in the attempt to better see and judge the size of the fence he is jumping. If the horse’s head is in a position like the dressage horse above he would not even see the approaching fence.

Horses can hear quite well and generally just flick their ears in the direction they are listening unless they think the sound is something they should check out more in depth by looking in that direction. One of the best indicators of where the horse is looking or paying attention is by looking at the direction his ears are turned. He may be facing forward but if his ears are passively (as apposed to pinned) back he is probably looking back.
Being aware of where the horse’s ears are can help you keep his attention on you or the task at hand as you work with him. If his ears are pricked forward and he feels a bit tense try talking to him in a calm voice and see if you can get his ears to turn toward you. If you can get that focus on you he is more likely to ignore that ‘monster’ he was just trying to check out. ‘Monsters’ grow bigger in the horse’s imagination when the horse is punished for his fear of them or if the horse feels the rider is oblivious to the perceived danger or afraid of the perceived danger. It is best to acknowledge it and by remaining completely relaxed assure him that he is safe with you. If the alpha horse (you) are not too concerned with the perceived threat then the horse will feel it is not a danger. If you spend enough time with a horse and are working with him to establish that hierarchy he will begin to trust your judgement-some horses take longer than others.

Horse's attention is on it's rider
This horse is listening to his rider. To spite all the activity around him the rider is doing something that has brought the horse’s attention to him. This is what you want particularly when you are adjusting the stirrups and girth in an open field with loads of activity around you.

Looking ahead
Now the same horse is looking into the distance to see something, his attention is not on the rider but on something else. If you want a quicker response to your aids it is best to talk to him so his ears flick back to you (the rider) before asking for something. In a situation like a fox hunt the horses generally do a lot of looking around which is OK as long as they are not frightened by what they are experiencing. The younger ones need to come out early in the season when there are fewer horses and hounds and less activity so that they can become accustom to all the action.

A horse’s sense of smell can be so strong he may respond to a smell that you may not even perceive. I once hacked out horses that lived, unbeknownst to me, somewhat near a pig farm. If we got too close (in the horse’s opinion) to the pig barn he would try to high tail it out of there leaving me perplexed at his behavior. I never smelled the pigs most of the time but he sure did-from far far away. Someone finally let me in on his secret and I could then deal with the issue of his fear. Just one more reason that as a rider/trainer you really need to understand horse behavior and his capabilities so as not to destroy your horse’s training.
As far as taste, anyone who has ever had to orally medicate a horse knows he can taste the medicine. As a feed specialist I have seen owners scratching their head as to why a horse won’t eat his food (and supplements), the first thing I do is put some on my tongue (unless he is on heavy meds)-if I can taste that it is too bitter, salty, yucky, so will he. I always think of the horse’s sense of taste like a child’s, they love sweet. If you need to give oral meds they need to be mixed with apple sauce, molasses or something like that. If they are too disgusting you may need to use a big syringe (no needle of course) to deliver it to the back of the mouth as a paste. Coat the syringe with something sweet to try to temper it.
In the evolution of the horse (and of humans) the sweet tooth developed because sweet foods are higher in calories. Finding something sweet in nature meant more fat could be packed on the body for the leaner times. Of course in nature that doesn’t mean you find a bag of sweet molasses covered grain (or Fruit Loops), maybe it means finding richer grass or some wild fruit tree (wild apples=tart and small, not domesticated or domesticated gone wild, fat, sweet apples). So the sweet tooth was a survival mechanism but now it can be deadly for both horse and human.

Finally we have touch which is the most direct form of communication between the horse and his handler/rider. There is perhaps not as much interpretation when working with and understanding this sense of the horse but still we need to be aware of how the horse responds to it. I also want to categorize the horse’s sense of space within touch. Because they (and you) have a comfort zone of space around them. When we infiltrate that space it is perceived nearly the same as touch. You would never approach another person that you do not know (or even if you know them) and get within inches of their face to talk to them, it would send the other person back, away from you, it would be perceived as a threat. Horses respond in much the same way. They have an unwritten code of what is acceptable.
Horses move away from pressure. All of our aids are based on that. The occasional stubborn horse will lean into pressure but that is not the norm. Where the pressure is placed and the intensity of the pressure will cause movement away from the pressure in relatively predictable fashion.

The point of balance is something all horsemen and women should understand. Without even touching the horse you can use this point to control a horse. Think of lunging a horse. Your lunge line in one hand you position yourself just behind the shoulder in an imaginary triangle to keep the horse moving forward. When you want him to stop you step toward his head bit and he slows down and stops.
When I teach the first lesson of horsemanship to children one of the things they learn is to lead a horse. Often kids want to turn and look at the pony and try to pull him towards themselves. Many ponies and horses will not budge if the handler is facing them no matter how hard they pull. I teach them to stand to the side, just at or behind the shoulder and pull forward on the halter or if they are too small to do that to cluck or tap behind the shoulder to get the horse moving. To stop, getting ahead of the shoulder and facing the horse usually is enough to do the job.

The flight zone can vary depending on the temperament of the horse and how desensitized he is to pressure. The zone is so important in everything we do around our horses, from catching them in the field to riding them. The more sensitive the horse the further away you can be and still effect his movement. Horses tend to become numb to pressure when it is over used. Think of the dressage rider who continually taps the horse with her spurs, after awhile that tapping just becomes background ‘noise’ to the horse. When she needs to get him moving forward a tap from her heel or spur will be ignored.
Understanding the way the horse perceives his world and responds to it helps the horseman/woman become a better trainer and caregiver to the horse and helps to build a better relationship between human and animal.