Ask yourself in your relationship with your horse, “who is healing who?”
You may find that the larger amount of healing is being done by the horse for your benefit, than there is being done by you for your horses benefit.
Of course it would be perfect for the relationship to be reciprocal, so that both of you can benefit and there is no taker and no giver in the relationship, but a healthy balance between the two.
Are you a taker or a giver? Are you feeding a horse so that the horse can feed your ego?
Who is healing who with you and your horse?