Where's My Dinner? It Was Here A Second Ago — The Sandpiper's Dilemma

At first, you couldn't ask for a better meal plan. The food is free, delivered straight to you. It lands, literally, right at your feet. All you have to do is bend over and eat. Except: the portions are very small and tend to slip away rather quickly. That's why sandpipers seem so frantic when you see them at the beach. Their food keeps disappearing.