Bugs and dirt are good for you, and cattle-rearing can teach us a lot about raising healthy kids. So says a family doctor who visited farms across the US, exploring the connection between how we care for our bodies and how we grow our food. And, a foraging expert tells Anne Strainchamps which wild plants are good to eat this spring. (The DNR requests the following note to listeners: "Watercress is an invasive plant and although it is not yet regulated (but will be next year) the plant roots should not be left.")