The metaphysical meaning of the horse is personal power – needing it, wanting it or learning how to use it. Horses can show you the way to the power within you.
From the human:
Sit for just a few minutes with a horse or out in nature – it could be as simple as being near to a tree or looking out a window at the sky or feeling the earth under your feet. Smile a little to soften your eyes and pay gentle attention to your outward breath. Notice the movement of the lower part of your ribs on that outward breath and the way that the ribs kind of squash the air from your lungs. You’re not doing that on purpose though, just noticing the outward breath and the movement of the lower part of your ribs.
Relaxation with breath is a first step to the inner awareness that is personal power. Whether you have a horse or not, this gift will help you get that breath happening easily.