I've seen a similar question posted here, but my vampires require specifically human blood. Anything other than human blood or water is disgusting and indigestible to them. Some more notes:
- Drinking from a willing victim is technically getting blood without hurting them, but it's still not ideal and not exactly what I'm looking for. These vampires don't like biting people and would like to avoid it if at all possible. They're young vampires and are prone to losing control and drinking too much, killing the victim and doing exactly what they don't want to do: kill the living.
- The setting is modern-day New York. And these vampires aren't all well-off, most of them are working standard jobs on New York wages, so they can't afford to pay people for blood whenever they need it.
- There is a blood shortage, and these vampires wish to be as ethical as they can be. So, they can't just go steal from blood banks or hospitals.
So far, one of the solutions I've come up with is paying small amounts of money to willing participants to donate their blood for this specific purpose. Unfortunately, I've hit a bit of a block. Any help is appreciated.