I found this scan of a cheetah at the Autodesk 123D site by Kit Hughes (copyrighted, CC BY-NC-SA 3.0 license). I pulled it into Tinkercad and cleaned it up. The one problem with it is that the chin has a bit of overhang and comes out a little scraggly, but it cleans up pretty quickly with sanding/filing.

I printed this on a Makerbot Replicator 2. I sliced it in MakerWare on the low setting with 5% infill.