Okay, now it depends on your spiritual belief's as to how much you read into it. I personally believe there is a life after death (I hear spirit voices, see things whilst awake, like visions and I get the prophetic dreaming so that's why I believe), and there are some people who believe that we all have spirit guides who help us on life's journey, and these can be animals as well as people.
After you die, you don't have a physical body anymore so you communicate by thought and because thought is universal across species, it is possible for animals to do this too. Some people who are highly tuned can pick up on thought patterns even whilst still in physical life, I can do this.
It may be that these horses were like friendly guides, telling you it's okay to cut back on your work and not feel guilty. There's nothing like the innocence and simplicity of animals to remind us when we are too serious.
Running and flying with horses - a way to have fun and relax.
Looking at it purely as dream and not spiritual experience, telepathy means you will recieve good news in the mail.
Flying - if you flew with ease, it means you will reach your goals.
Horses- from a dream point of view I'd need the colouring of the horses to tell you.
