I’d always imagined the Rat Cook as something anthropomorphic. Like one of the puppets from “Meet the Feebles”. However, that was not what was described. So, I had to make an effort to keep from drawing something more realistic and scary.
Afterward the gods transformed the cook into a monstrous white rat who could only eat his own young. He had roamed the Nightfort ever since, devouring his children, but still his hunger was not sated. “It was not for murder that the gods cursed him,” Old Nan said, “nor for serving the Andal king his son in a pie. A man has a right to vengeance. But he slew a guest beneath his roof, and that the gods cannot forgive.” Bran pg 764
