Scruff the mouse and then find the tip of the Mandibular bone using your finger or the back end of the Goldenrod Lancet.  The correct spot is just behind and above the tip of the Mandibular bone.

Tip of the Mandibular Bone

Cluster of veins

The correct spot is just behind and above the tip of the Mandibular bone

MEDIpoint, Inc.

MEDIpoint International, Inc.