I have two 17 week old ducks (Cayuga and Pekin) and one 15 week old duck (Swedish). The Cayuga has been posturing over the last week and the others have made no signs that they are maturing. When should I put a nest out in the coop for them? I have chicken nests but they are too high for the ducks to get into. The flock free ranges so I want to make sure they lay in the nest and not in random outside spots so I want to show them a suitable nest but I also don't want birds sleeping and pooping in it for weeks before they start laying.