The horses neck/ ear is an eagle feather, with a cross (which represents a morning star or butterfly)
The dots in the horses eye are constellations. The arrow coming from the mouth is emphasizing the horses throat. This was one of the organs that was believed to be the source of the super natural power in spirit animals. The cheek bone is a medicines wheel. When I started this painting it was suppose to turn out completely different but somewhere in the mix this became the outcome.