I am really new at this. I have 13 mixed flock hens, they started laying about a month ago and they have been increasing production daily. We are now getting 6-9 eggs a day (very proud of the girls). We have six nest boxes (the aluminum type 3 upper and 3 lower). From the start the girls have been using the 3 lower boxes, but I can not tell that they even know that the upper ones are there. This week we have found 3 eggs outside on the ground. How can I get the girls to use the upper nests. Can I block off the lower ones and hope they find the upper ones?