Maybe it's just me, but I feel like a lot of vampire fiction is written by people who don't seem to realize that blood as food is a socially acceptable thing in some cultures. And a freaking butcher has a shitton of blood. ((though I guess if a vampire is broke, it doesn't matter))
You don't understand how much I hate vampires who angst about bloodlust when they can eat animal blood. I mean, I can see how troublesome eating only human blood is since humans are a bit loathe to give up their blood, but animal blood? NOT THAT HARD TO ACQUIRE SINCE PEOPLE EAT MEAT.
And many vampires are Christian, and at least some Christian sects don't care too terribly about eating animal blood. I know it's against halal and kosher stuff so I guess it's more troublesome for Jews and Muslims, but I genuinely can't remember the last time I've seen a Jewish or Muslim vampire. I can think of like... a Jewish werewolf and then I'm stuck.
Though now I want to write a story about a vampire who works as a cook at a lord's manor and keeps buying animal blood on his boss's tab.