Never feed aquatic wildlife like ducks and geese pieces of bread. While it may conjure up memories of childhood, the reality is that the bread is not a healthy treat for them. Bread is low in needed nutrients for birds, and it can cause their organs to become fatty, which leads to problems like heart disease, liver issues and other major health complications. Birds can also become dependent on us for food, which can lead to aggressive behavior. If you enjoy feeding ducks and geese, reach for a healthy choice like cracked corn instead. They love it, and a little can go long way.