My ducks just started laying last weekend, so far just 3 eggs. How important is it for ducks to have nest boxes if I'm not going to let them sit them? Right now they've laid the last two in the coop on the floor. If I keep the floor clean with a good layer of straw so they need nest boxes? They are Khakis and Cayugas. 20 wks old last Monday. The eggs are light tanny orange so I'm thinking it's a Khaki laying.