When night came, Mr. Crepsley emerged and rubbed his belly. "I am starving," he said. "I know it is early, but let us head out now. I should have taken more of that silly Scout-man's blood. I think I will track down another human." He looked at me with one eyebrow raised. "Maybe you will join me this time."
"Maybe," I said, though I knew I wouldn't. It was the one thing I'd sworn I would never do. I might have to drink the blood of animals to stay alive, but I would never feast on one of my own kind, no matter what Mr. Crepsley said, or how much my belly growled. I was half vampire, yes, but I was also half human, and the thought of attacking a living person filled me with horror and disgust.
CHAPTER FOUR
Blood…
Mr. Crepsley spent a lot of his time teaching me about blood. It's vital to vampires. Without it we grow weak and old and die. Blood keeps us young. Vampires age at a tenth the human rate (for every ten years that pass vampires only age one), but without human blood, we age even quicker than humans, maybe twenty or thirty years within a year or two. As a half-vampire, who aged at a fifth the human rate, I didn't have to drink as much human blood as Mr. Crepsley — but I would have to drink some to live.
The blood of animals — dogs, cows, sheep — keeps vampires going, but there are some animals they — we — can't drink from: cats, for instance. If a vampire drinks a cat's blood, he might as well pour poison down his throat. We also can't drink from monkeys, frogs, most fish, or snakes.
Mr. Crepsley hadn't told me the names of all the dangerous animals. There were a whole lot, and it would take time to learn them all. His advice was to always ask before I tried something new.
Vampires have to feed on humans about once a month. Most feast once a week. That way, they don't have to suck much blood. If you only feed once a month, you have to drink a lot of blood at one time.