In a previous question I mentioned you could reduce an entire village to a mindless horde using Feeblemind, and given a high enough DC, they'd be unable to save against it.
Someone I talked to in real life mentioned that they could all die by just forgetting to eat and do other basic tasks necessary to survive (using the restroom, sleeping/meditating, etc.) I was wondering whether this would be true in the game world.
Nothing in Feeblemind addresses this, presumably because someone afflicted by it would still have friends and companions who would take care of it, as the spell description does mention a character could still "identify its friends, follow them, and even protect them."
I'm inclined to say yes, the villagers could still function because each victim repeats the save every 30 days. It wouldn't make sense to have a save that long if the victim would just die after a few days.
Are there any official rulings on this, or are there similar spells or relevant rules that address what level of intelligence is required to perform basic tasks necessary to survive?