I have a small flock of 10 ducks that have been free ranging since they were about 6 weeks old. As they get closer to a laying age I am becoming concerned about them having a place to lay their eggs. I can build a nest box but I'm not sure if they will use it. They do not have a coop, they live outside and sleep where they want, usually underneath the rabbit hutch. If I build a nest box near there will they use it? If not, I'm open for suggestions on how to get them to lay eggs in a nest box. Thank you