yes, their are snakes out there that eat other snakes and venomous snakes as well. The Cobra, King, Coral and Indigo Snakes eat other snakes. Many people mis identify the long flat-black, black racer for the larger shinny, glossy-black indigo snake which does eat other snakes along with rats, mice, rodents and frogs, toads as well. The Eastern Indigo Snake is Federally Protected by Federal Law.