In my horsey internet wanderings I found the website of KONI Miniatures. Wowza. That pretty much sums it up. The artist makes wonderfully expressive models, often with drastic customization, and does beautifully detailed finish work. In her Past Pieces gallery she often shows what body the model started out as, and some of the transformations are just amazing.
Few customizers would see potential in this Horse Shaped Object:
But she turned him into this lovely, expressive equine: