We have 4 ducklings 5-6 weeks in age we are building a coop - Here are my questions: Do we need to make a nesting box for them to lay eggs in we didn't put that in the plans for our coop? We don't know the sex of our ducks yet if they are all girls great we will have no problems but if there is a male among them how do I keep the ducks from mating I want to avoid fertile eggs if possible. Any advice is that possible and also how do I determine if the eggs are fertile is it only in the spring I have to watch or do I have to check each egg we wouldn't want a surprise egg if you know what I mean. My uncle mentioned he lived on a chicken farm and occasionally they would have an egg that was fertile get in the mix of the eggs collected and I really don't want that to happen. Any advice please share. Also do I have to feed them anything special when they are laying. Thanks so much - MUSCOVY named Bacon, Rouen named Reeses, Pekin named Sunshine, & Cayuga named Raven.