This is dot-kit's model, with a hole added in the belly area to allow mounting it onto the included base.
Single-extruder printer users will want to rotate the horse onto its hind/tail end, about 70 degrees off of the horizontal, to minimize the impact from the support material.
Make sure the support columns are SOLIDLY fixed to the plate so that the vibrations from the movements of the table don't knock them over. Slic3r produces a few pretty thin ones with this model, but a raft and brim should help that issue.
Printer Brand: RepRap
Printer: Prusa i3
Rafts: Yes
Supports: Yes
Resolution: 0.2 mm
Infill: 30%
Notes:
I recommend printing the stand separately from the horse (in my case, the movements of the head, variations in nozzle flow, etc. caused the stand to develop weak spots during print that were not repeated when I re-printed it alone).
Careful of the front hooves, they're a little weak around the ankles.
I just loaded the model into Blender, generated the stand object from two cylinders and a bit of resizing, then used the upper end of the thin one to punch a hole into the horse model, which I then expanded a bit to provide a decent gap (you may still need to ream it out, or sand the top of the stand down a bit)
The author remixed this model. Imported from Thingiverse.