Portnoy changed physically over the years; sometimes into an entirely different animal. It was initially unknown what species he was; sometimes a squirrel, an opossum, or a gopher. Finally he was revealed as a groundhog, which he had hidden because Hodge didn't associate with "pigs". Eventually the two made up.
Portnoy and Hodge enjoy human-like entertainment, such as strip bars and playing jokes on others (Portnoy once pretended to be stuffed).