A perfectly cooked duck breast should have crispy, savory skin—a reward so good that it makes the tedious job of plucking worthwhile. Developing that crust and getting a juicy, medium-rare center is easy to do in theory, but can be tricky in practice. I’ve cooked a lot of waterfowl in my life, using birds from different regions with diverse diets. These variables make wild ducks and geese beautifully unique and delicious, but it also makes them...