As I said in the comments, your art is reaching new peaks.
By looking at the image, the perceptive viewer can understand and single out the different type of skills the artist used to make the work: art, animal anatomy, biology, nature, aerodynamic and photographic eye. Everyone of those skills as been employed by the artist to study and focalize the image of the running horse (photographic eye) to define the correct and natural position of it's body parts (animal anatomy and biology come into play) and the light and definition of the shadows relative to it's movements ( nature and aerodynamics).
All those skills and knowledges, wisely mixed and utilized by the artist with what we can call the bonding skill (art), produce the high quality works we are looking and admiring now.
With time and nurture, the skills of the artist are expected to grown exponential and reach even higher tops, so I reccomend to keep it up and never stop creating