Vampires: They need to drink blood.
They can however drink a small amount at a time and not kill the human. Its harder when the vampire is younger to control the urge to kill. They can also feed off of animals. They can feed off of vampires but the blood do es not last as long because the other vampire has taken most of the good stuff from the blood.
Were/shifter: They can eat fresh meat in their animal form but they do not carve meat. They do how ever like to be in the open and be able to run free.