06/02/2026
Not So Merry Go Round
The round pen, rope halter and lead rope. This combination of things seems to have become as much a part of each other as bit, spurs and whip have been over the course of many centuries. As opposed to bit and spurs, the round pen and the lead rope seems to have an image of kindness and friendliness whereas bits and spurs do not. “Working the horse gentle and without violence” is what I hear people say about it. When I ask people why it is so friendly, they mostly reply that it is natural to the horse to be handled in this way. Hence the term ‘Natural Horsemanship’ that is often used to describe a way of working with a horse with rope halter, rope and round pen.
Question is, is this way of working and handling the horse really natural from the horse’s point of view? What really is the effect on the horse’s physical and mental state?
Let us take a closer look at the biomechanics and mental factors behind working the horse in a round pen. I am now only going into the round pen itself.
Round versus square
In Europe we put horses behind or train them in square or rectangular paddocks, arena’s and picaderos since ancient history.
Round penning or corrals seem to be associated with the ‘Far West’, the Cowboys and mustangs. Indeed, I presume the round shape is a good choice to chase in wild horses. Here I see a clear danger with corners either for the panicky horses themselves or the humans that need to handle them. Nowadays, the wild horse scene has become a rare image.
Still the round pen is used and not only in the US, it has come to Europe. More and more we see the round pen being used for just one horse and often not a wild one at all. I have asked western trainers and trainers who call them selves horse whisperers or natural horsemanship trainers, why they use a round pen and not a square pen, to me known as a picadero or simple an arena. The answer I received was: “Because the horse can not ‘hide’ in the corners.” If there are any other reasons to it that you, reader, might know, please enlighten me. But so far, that is the only one I have heard over many years from many people. The horse can not ‘stop’ in the corners, or use the corners to change direction, brace himself etc.
The use of the round pen, when googling, tells me it is first and foremost to ‘break (in)’ horses. Breaking a horse would indeed need a pen where he can not hide, stop or brace so that makes a lot of sense. However, where does that leave this ‘non violent’, ‘kind’, ‘gentle’ and ‘Natural’ training in relation to the round pen? I shall come back to that later.
First I would like to explain, why, if you want to work in a way that will benefit your horse, you better use a picadero (square pen). The answer to that is: because the corners benefit the horse’s physical development.
When a horse walks, trots or canters in a square or rectangular arena, every time he really goes through the corners, he lifts his shoulders and comes out of the corner more straight and uphill. Therefore the corners are a big part of the Gymnasium
(anciently known sequence of exercises that empowers the horse) for a horse who takes a corner produces a small Shoulder In. Shoulder in, is in fact a horse walking as if going through a corner, but then keeps his shape and walks in a straight line forward. Of course, when you work a horse free in a rectangular space which is too large, the horse will often cut the corners.
That is why a picadero was invented. It is a square measuring 12 by 12 or 15 by 15 meters. Within the picadero, just following the track in walk, trot or canter will benefit your horse by lifting his shoulders each corner.
Hide and seek
The next benefit for your horse is the very thing which was called a disadvantage by users of round pens: The horse can ‘hide’ in the corners. So why would that be an advantage? Because you can learn about the best of way of handling that specific horse. If your horse seeks to evade you, he simply does not feel comfortable with you or sees any benefit in doing what you are asking. If your goal is the benefit of your horse, you are very happy with that knowledge. For you want to adjust your question or the situation thus ,so your horse does feel more comfortable. Only this way will he truly learn to trust you because he’ll know, the things you’ll ask him are for his benefit, through fairness and consistency.
Horses are able to go long and low because of correctly being supported by the corners of the picadero and the body language of the human. This way, the horse will not injure his shoulders.
“Okay, so the round pen does not have the benefit of the corners”, you might think, “so what”? Well, it is not just that the round pen lacks the benefit of the corners, it presents the horse with the exact opposite of this benefit. You see, the problem with the lack of corners produces a health hazard to the horse as soon as he starts walking, trotting or cantering along the track. Going round in circles is an unnatural move to a horse. A horse is shaped to eat from the ground and go, walk, trot and canter in sort of serpentine lines, never really round and never on a true straight line. In nature, just going straight constantly or round will never happen. So, the equine body is not equipped to do circles and straight lines. In a round pen however, the horse makes continuous circles.
The effect of this will produce the following:
The horse will pivot around his inside front leg and shoulder. This will, over the long run produce contra collection, crookedness and lameness. The horse will immobilise himself and will become very hard to work in hand or ride in lightness. By chasing a horse in a round pen, you chase the collection out of the horse and produce exactly the opposite.