Find the supporting shape
Locate where the body meets the surface and which limbs carry weight. Sketch the spine's direction and the largest body masses lightly. This gives the pose stability before ears, eyes, or fur are added.
Compare negative spaces
Look at the gaps around the tail, beneath the chin, and between the legs. Their shapes often expose a proportion error more clearly than staring at the outline alone.
Finish selectively
Use a few darker marks to clarify overlap and focal features. Suggest the direction of fur without covering every surface in strokes. Stop while the initial gesture still feels alive.