I've already finished the game at normal difficulty, so to make things more interesting I've decided to see what I can do in hard. So far I've lost 2 villages. My villagers eat all the berries and then starve to death before they get enough points to plant a crop. My latest village all the berries are gone but all of the adults are doing research. They're still 800 points away from the next farm level and out of food. Any tips on keeping them alive til their crops come in?