I have a female Rouen that has built a nest out of pine straw in a corner on the outside of two houses I have for them. The houses are positioned to make a inside corner between them at their backs. She has laid one egg in it. Could this be a sign that she is getting ready to maybe sit on the nest she made and go broody? Versus making a nest inside one of the houses? The houses both have pine shavings in them.