Pinky plays a snake oil salesman in the old west, by the name of Dr. Phink.
At the time of this short, supplements of all kinds were being advertised to improve 'iron poor blood,' another name for anemia. One of the most famous was Geritol, which sponsored many TV and radio programs.
A modern, stylized rendition of what appears to be a Joshua Tree is shown in the background a few times. These towering members of the lily family are native to the Mojave Desert, which is near Southern California.