...in addition to protection and companionship, Thog was quick to learn the benefits of domesticated dogs. Ya see... Thog's cromagnon companion is very displeased with the foul odor about and is holding his nose looking at THOG disgustingly... and THOG is smiling & pointing at the dog as if to say, "not me... it was him".

Just a brief interpretation. Refer to VTJesse for a more complete analysis!!!