There is also a theory floating around that the leucism in the pied isn't unlike that displayed in the spider and this is why Spider Pieds have all white body's and just color on their heads. It is thought that the two forms work together to form a verson of the Lucy. We also see this in the Lesser Pied. Seeing as how the lesser is the most drastic version of the het Lucy it makes since that the Pied and it work together to make a BEL..
HOWEVER.. there are whispers that RDR's Pied Lesser may be toting something else in there.. I've heard tell of Lesser Pieds that are just that Lesser colored Pieds.. Only time will tell