I have had this idea for a while now, and I finally got around to making it into a reality.
The horse was hand sculpted from polymer clay and epoxy over a wire and foil armature, without the use of molds. The horse is painted with acrylic paint.
The horseshoes on the sides of the shadowbox were sculpted from polymer clay.
For the "barn", I dyed some craft sticks brown with fabric dye and glued them to the sides of a shadowbox.