Vampires with withered stomach weakness vomiting over plasma fruit salad

Yeah, this is a pretty stupid thing, I also have a vampire who can't eat food, so I thought he at least could have dinner with his family by eating the plasma salad, but nope, felt sick after XD And also how ridiculous is it when he wants to have a grand meal as the tradition on holidays XD I always let him eat as it fits with his character, but poor guy always ends up throwing up after :D I have some vampire custom food, but I think I haven't tried it yet, but I am afraid he won't be able to digest it anyway. So I guess he can only drink bagged plasma or drink from sims, which he doesn't do as he tries to set up example for his children and be good.