Curious indeed. I see a possible milkshake in the offing with sap plus milk...
Well, to be fair, I do remember being overloaded with stones relatively recently. And there was a recent debilitating need for wool that I think was more story than event based. So they do seem to aim at diversification. And while I know I've chopped a lot (a lot, a lot ) of trees since I've started Castle Story, this particular angst might just be the unfortunate confluence of two very recent storylines.