Will and his friend were discussing a past experience. They had once tried to feed a poultry pie (a type of meat pie) to mallards–ducks which live in parks. Much to their surprise, the ducks ate the pie. This surprised Will, because they were so bloodthirsty–meaning they were eager to eat what they were given. Will’s friend seemed to learn a lesson from this experience, as they both agreed that one should never trust a duck.