The Mound Builders ate a variety of different types of foods Corn was brought into the area from Mexico and was widely grown together with other vegetables like beans and squash. They also hunted both animals like rabbits and squirrels, and animals like bison and different types of deer. In some lake zones they ate wild rice, and they also ate fish either from the ocean or from freshwater lakes and rivers. They dried many foods to eat in the winter. And they also drank water from freshwater rivers