I'm planning on building a feeder for my future ducks. I have a question: Let's say the opening of the feeder is so small that not all ducks can eat at once. Will the ducks take turns eating, or will the weaker/lower-ranked ducks risk not getting enough food? When the first few ducks are finished eating and walk away, will the remaining ducks be smart enough to start to eat, or will they, gregarious as they are, follow their friends, despite their hunger? (I have a feeling my chickens sometimes do this.) And if all the ducks need to be able to eat all at once, how big a hole must the feeder have? How many inches of width per duck?