I noticed you can get infinite food sources from breeding rabbits, as you dont have to feed the rabbits and once you get a male and female they can be multiplied instantly for many more rabbits that can also be multiplied. That and if you have a tupperware container with food in it and an empty tupperware container, you are given the choice to put the full container into the empty one. You can then eat the container and it will give you one empty container and one full container. Basically the game gives you food points and also gives you back the food you originally put into the other container, making for another infinite food source.