One thing's clear, however: The artist purposely chose to position each image above a protruding ridgeline that runs along the cavewall, symbolizing either the surface of the water or tall grass that's obscuring the lower half of the deer.
Charlotte Faurie and Michel Raymond at the University of Montpellier, France, deduced the prehistoric cave painters' handedness by spraying paint against cave walls to see which hand they pressed against the wall, and therefore did not use for drawing.