the LORD God said unto the serpent

GEN 3:14 And the LORD God said unto the serpent, Because thou hast done this, thou art cursed above all cattle, and above every beast of the field; upon thy belly shalt thou go, and dust shalt thou eat all the days of thy life:
Looks like not even the snakes care that much about gods words. Not a single one of the about 3000 species eats "dust".