The Cow is a species only found within the Nutripils Factory, however they are all either corpses or mutilated body parts floating within test tubes; it is assumed that they were attacked and killed by the DomZ Reaper. In the Laboratory a Mosquito can be found sucking blood from a Cow corpse, showing that the kill was fresh, but what it, or any other cows, were doing in the factory in the first place is unknown.