Wait… when were the demons starving? I could’ve sworn they were farming happily inside that barrier on top of the mountain. Weren’t they? Weren’t they all just up there on the mountain farming? Farming happily?
I thought Lloyd went and found them because he needed to use their land. The demon’s weren’t having any issues and they weren’t starving. He just needed their territory for his train.
Are you sure you’re not thinking of the dancing bandits? The ones who do a strange river dance + hip hop? The mom and kid were hungry but the dancing/singing dad was a jerk? I just can’t think of any other starving groups… wait, the elves were starving because they can’t eat plants and there were no animals left… yeah, but no demons starved in that series that I can recall… is it already time for a reread?
They weren't starving and lived good , only thing that happened was that there was a barrier put up to stop any harm by demons or humans to the other side.
But due to the barrier slowly the soils fertility was getting depleted, but lloyd came in clutch helped them expand it I think, I just read chapter 169 of greatest estate developer and that's what happened.

Reading this make me feel sad, especially if their future is the same as when Lloyd found the demons starving because they lost the ability to farm. It's just so sad to think, life after all the hardships they've gone through ...