My two female ringneck doves were born this past summer. They started laying eggs in the fall but seem to have stopped in the New Year. When they started laying I started providing them with a nest (a plastic container lined with hay secured to the side of their cage raised up off the ground) 24/7. My only issue is, they seem to be spending the vast majority of their time in the nest now, even when they have no eggs. They'll leave the nest to eat or drink, but then they'll go back. Is this unhealthy in any way, or should I not worry about it?