The Ecology of Vampires

Ethan Hawke had a movie just this year in which the vampires have literally overrun it. They come into a food shortage problem because there's not enough humans left to drink and they start ranching them. There's a comic by Chris and Bobby Crosby, I think, called Last Blood,. A similar concept where you've got vampires who have basically overrun the humans and then we have a zombie outbreak. If we don't save the humans from the zombies, we're all dead. That's awesome.