Dave and Martha paint two sides of one coin

On the left we have a painting entitled: "Bear copyright 2010 by Martha Putnam." Bear was a male American Bulldog who lived to be 13 years old. He was the kind of dog that a caveman would need to defend his home from fearsome prehistoric monsters; a mixed blessing because Bear once stampeded a herd of cattle through a fence, tore up several steers, and endangered several cowboys. He would administer the same treatment to raccoons and other varmints.
Below is a painting entitled: "The Cave copyright 2010 by Dave Putnam." Here I am trying to give the feeling someone would experience if he or she lived in a cave and had a ferocious bulldog as a protector.