This was a door at a lumber yard that I thought I might duplicate or something similar sometime in the future, so I took a picture. I'm not sure where they got the clipart. However saying that, Vectic has numerous clipart of horses and other animals that comes with their software, and in their Design&Make section. Also, if I remember right, in some of their tutorials are supplied with clipart. It may be hard to tell from the picture, but it is in fact a 3D carving where the smaller horse protrudes over the center rail. I would have to go back and look at it, but the rails and panels maybe be carved out of a solid piece. If I was doing it, I might choose to treat as an inlay over the center rail.