They can have some North Koreans come over and show them how to make grass salad and tree bark soup.
In India there is a caste system of rat catchers (to help the farmers). They get to keep and eat the rats and the rice they find in the rat tunnels. Good catchers will have enough to cook and sell for additional income.
That would be an easy source of protein - think of them as squirrel without the bushy tails.