Quoted from badbilly27:
I never understood why some vampires who are conflicted with drinking blood from humans and turn to rats to survive just don't go to Africa and feast on 65 galloons of blood from an elephant.
Because animals don't have the life experience that humans have and they are also innocent. Don't you read the Vampire Chronicles? If I were lucky enough to be a vamp I would feast on the blood of the people who make life miserable for the rest of us. Not referring to politicians alone but there are plenty of humans who profit from the misery of others. They would be tasty.