To see a pony, when you are dreaming, stands as a symbol of playfulness, enjoyment, amusement. Pony is also a sign of the playful pleasures in your life. Alternatively, ride on pony (small horse) is representative of your unexplored, underdeveloped, undisciplined abilities to do something or act in a particular way.
Dream dictionary: pony dream meanings
To see ponies in your dreams, signifies moderate speculations will be rewarded with success.