This model is the skull of a 5 years old and 4 kg chihuahua. It is built from a scan realized for veterinary purpose (the dog is alive and well). No bone anomalies where observed on the scan.

The "full definition" model contains the skull and some vertebras in high definition and merged together as source for biological purposes.
The "ready for print" model is a version with a simplified 3D mesh and the jaw separated.
The "base" is a simple stand you can use to keep the skull straight. 

Model generated with the open source software 3D Slicer