The opening scene of House just showed a white lab rat starting to munch on the researcher who was working with him, after the researcher had just keeled over on the floor with the Mystery Disease of the Week.
Okay, listen, scriptwriter(s): That just wouldn't happen, okay? Unless it was an absolutely STARVING rat.
Thanks, people, for playing to the illogical fears of all the uninformed rodent-haters of the world. Thanks a lot.