the chests are totaly unreliable as 80% of the chests are Artifact chests and 19% are gold and 1% are food chests.
the most reliable and only true means of getting food which i only just remembered is to start fighting a sentaur and then surrender once you have bought the only 2 town teleport scrolls from the shops one in one of the 2 towns and the other i think is sold by the witch so when you surrender to the centaurs they take you captive in the village just outside the map and while there you just do the 2 diffrent sceans there to make money and get food which will grow little by little so to get a good amount depends on how much you can grit your teeth and not die from boredom and once you got what amount you need to play without too much worry then use the teleport scroll to get back out but be warned if you do this and you dont have a teleport scroll to get out then your game is pretty much you perma stuck and have to quit and load a save file from before you went in. To get a decent amount of gold which i think is 2 gold per day and 10 food per day to get a good amount takes about 3 hours in real life time! I erm am totes not a centaur gangbanger in the game lol. anyways hope this helps heaps!
ps the centaur village is the only place i think you can buy the centaur cock dildo.