We have 8 chickens that are 20 weeks. We had one that started laying a little over 3 weeks ago. From the beginning she has only laid in the corner of the back wall and the droppings board that is 9” below the upper roost. We were out of town for the holiday but were told we had 3 eggs a few times, which meant more were laying, but they also laid along the back wall on he dropping board. We have several nest boxes lower than the roost that are private and we put golf balls in them. How can we get them to lay in the boxes?