Vampire eating.
I have a vampire who is constantly trying to eat food. I don't think I have ever had this problem before and I have played a fair few vampires. He just keeps going to the fridge and grabbing a plate...
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It sounds like a bug. Assuming you've already checked if mods are involved or aren't using any, I would probably try turning him human and turning him back again. My vamps can eat food and be completely fine with it as long as they haven't got that weakness.
