I'm starting a ghost/non-lethal run of Dishonored and I know I need to avoid rats eating my victims. I've noticed that single rats do not appear to go after corpses, but big swarms definitely do. So how many rats is enough to start eating corpses? I've noticed they only seem to eat corpses in "swarms" that will also attack the player.
But leaving a single or just a couple rats alive around bodies is okay...right? from further experience it appears that, rarely, randomly spawned rats may be enough to kill unconscious people! I found four rats in the general area of a dead guy, however I'm not 100% sure the rats killed him, as his corpse wasn't eaten to the bone, and I didn't see the rats attack him. It'd be extra useful to know whether or not randomly spawned rats will spawn in great enough numbers to kill an unconscious person.